AK: Remove StringBuilder::build() in favor of to_deprecated_string()

Having an alias function that only wraps another one is silly, and
keeping the more obvious name should flush out more uses of deprecated
strings.
No behavior change.

103 files changed, 168 insertions, 168 deletions

diff --git a/Userland/Applications/Browser/CookieJar.cpp b/Userland/Applications/Browser/CookieJar.cpp
index 4fc39a5bdc..ddb99ccd4a 100644
--- a/Userland/Applications/Browser/CookieJar.cpp
+++ b/Userland/Applications/Browser/CookieJar.cpp
@@ -88,7 +88,7 @@ DeprecatedString CookieJar::get_cookie(const URL& url, Web::Cookie::Source sourc
         builder.appendff("{}={}", cookie.name, cookie.value);
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 void CookieJar::set_cookie(const URL& url, Web::Cookie::ParsedCookie const& parsed_cookie, Web::Cookie::Source source)
@@ -150,7 +150,7 @@ void CookieJar::dump_cookies()
         builder.appendff("\t{}SameSite{} = {:s}\n", attribute_color, no_color, Web::Cookie::same_site_to_string(cookie.same_site));
     });
 
-    dbgln("{} cookies stored\n{}", total_cookies, builder.build());
+    dbgln("{} cookies stored\n{}", total_cookies, builder.to_deprecated_string());
 }
 
 Vector<Web::Cookie::Cookie> CookieJar::get_all_cookies()
diff --git a/Userland/Applications/Browser/Tab.cpp b/Userland/Applications/Browser/Tab.cpp
index 64991c0a05..4ce7105f11 100644
--- a/Userland/Applications/Browser/Tab.cpp
+++ b/Userland/Applications/Browser/Tab.cpp
@@ -518,7 +518,7 @@ Optional<URL> Tab::url_from_location_bar(MayAppendTLD may_append_tld)
             builder.append(".com"sv);
         }
     }
-    DeprecatedString final_text = builder.to_deprecated_string();
+    auto final_text = builder.to_deprecated_string();
 
     auto url = url_from_user_input(final_text);
     return url;
diff --git a/Userland/Applications/CharacterMap/CharacterSearchWidget.cpp b/Userland/Applications/CharacterMap/CharacterSearchWidget.cpp
index 29e42d56a9..4c87103979 100644
--- a/Userland/Applications/CharacterMap/CharacterSearchWidget.cpp
+++ b/Userland/Applications/CharacterMap/CharacterSearchWidget.cpp
@@ -90,6 +90,6 @@ void CharacterSearchWidget::search()
         StringBuilder builder;
         builder.append_code_point(code_point);
 
-        model.add_result({ code_point, builder.build(), move(display_name) });
+        model.add_result({ code_point, builder.to_deprecated_string(), move(display_name) });
     });
 }
diff --git a/Userland/Applications/CrashReporter/main.cpp b/Userland/Applications/CrashReporter/main.cpp
index d0b9b5368a..f3c6a46b2a 100644
--- a/Userland/Applications/CrashReporter/main.cpp
+++ b/Userland/Applications/CrashReporter/main.cpp
@@ -100,7 +100,7 @@ static TitleAndText build_backtrace(Coredump::Reader const& coredump, ELF::Core:
 
     return {
         DeprecatedString::formatted("Thread #{} (TID {})", thread_index, thread_info.tid),
-        builder.build()
+        builder.to_deprecated_string()
     };
 }
 
@@ -125,7 +125,7 @@ static TitleAndText build_cpu_registers(const ELF::Core::ThreadInfo& thread_info
 
     return {
         DeprecatedString::formatted("Thread #{} (TID {})", thread_index, thread_info.tid),
-        builder.build()
+        builder.to_deprecated_string()
     };
 }
 
diff --git a/Userland/Applications/FileManager/main.cpp b/Userland/Applications/FileManager/main.cpp
index 906098fb25..6f61c64588 100644
--- a/Userland/Applications/FileManager/main.cpp
+++ b/Userland/Applications/FileManager/main.cpp
@@ -144,7 +144,7 @@ void do_copy(Vector<DeprecatedString> const& selected_file_paths, FileOperation
         auto url = URL::create_with_file_scheme(path);
         copy_text.appendff("{}\n", url);
     }
-    GUI::Clipboard::the().set_data(copy_text.build().bytes(), "text/uri-list");
+    GUI::Clipboard::the().set_data(copy_text.to_deprecated_string().bytes(), "text/uri-list");
 }
 
 void do_paste(DeprecatedString const& target_directory, GUI::Window* window)
@@ -213,7 +213,7 @@ void do_create_archive(Vector<DeprecatedString> const& selected_file_paths, GUI:
         if (!archive_name.ends_with(".zip"sv))
             path_builder.append(".zip"sv);
     }
-    auto output_path = path_builder.build();
+    auto output_path = path_builder.to_deprecated_string();
 
     pid_t zip_pid = fork();
     if (zip_pid < 0) {
diff --git a/Userland/Applications/SpaceAnalyzer/main.cpp b/Userland/Applications/SpaceAnalyzer/main.cpp
index 44f9262e3c..6d4ad1591f 100644
--- a/Userland/Applications/SpaceAnalyzer/main.cpp
+++ b/Userland/Applications/SpaceAnalyzer/main.cpp
@@ -146,7 +146,7 @@ static DeprecatedString get_absolute_path_to_selected_node(SpaceAnalyzer::TreeMa
         TreeNode const* node = treemapwidget.path_node(k);
         path_builder.append(node->name());
     }
-    return path_builder.build();
+    return path_builder.to_deprecated_string();
 }
 
 ErrorOr<int> serenity_main(Main::Arguments arguments)
diff --git a/Userland/Applications/Spreadsheet/Cell.cpp b/Userland/Applications/Spreadsheet/Cell.cpp
index 9b534328ba..d56b48e454 100644
--- a/Userland/Applications/Spreadsheet/Cell.cpp
+++ b/Userland/Applications/Spreadsheet/Cell.cpp
@@ -42,7 +42,7 @@ void Cell::set_data(JS::Value new_data)
     StringBuilder builder;
 
     builder.append(new_data.to_string_without_side_effects());
-    m_data = builder.build();
+    m_data = builder.to_deprecated_string();
 
     m_evaluated_data = move(new_data);
 }
diff --git a/Userland/Applications/Spreadsheet/CellType/Format.cpp b/Userland/Applications/Spreadsheet/CellType/Format.cpp
index 77b8f32eda..663aa2173d 100644
--- a/Userland/Applications/Spreadsheet/CellType/Format.cpp
+++ b/Userland/Applications/Spreadsheet/CellType/Format.cpp
@@ -43,7 +43,7 @@ DeprecatedString format_double(char const* format, double value)
     auto putch = [&](auto, auto ch) { builder.append(ch); };
     printf_internal<decltype(putch), PrintfImpl, double, SingleEntryListNext>(putch, nullptr, format, value);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 }
diff --git a/Userland/Applications/Spreadsheet/Spreadsheet.cpp b/Userland/Applications/Spreadsheet/Spreadsheet.cpp
index 4c7d27e8dd..3893e3988e 100644
--- a/Userland/Applications/Spreadsheet/Spreadsheet.cpp
+++ b/Userland/Applications/Spreadsheet/Spreadsheet.cpp
@@ -745,7 +745,7 @@ DeprecatedString Sheet::generate_inline_documentation_for(StringView function, s
     }
 
     builder.append(')');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Position::to_cell_identifier(Sheet const& sheet) const
diff --git a/Userland/DevTools/HackStudio/Editor.cpp b/Userland/DevTools/HackStudio/Editor.cpp
index c56edd7790..c4c15a402d 100644
--- a/Userland/DevTools/HackStudio/Editor.cpp
+++ b/Userland/DevTools/HackStudio/Editor.cpp
@@ -737,7 +737,7 @@ void Editor::handle_function_parameters_hint_request()
         }
         html.append("<style>body { background-color: #dac7b5; }</style>"sv);
 
-        s_tooltip_page_view->load_html(html.build(), {});
+        s_tooltip_page_view->load_html(html.to_deprecated_string(), {});
 
         auto cursor_rect = current_editor().cursor_content_rect().location().translated(screen_relative_rect().location());
 
diff --git a/Userland/DevTools/Profiler/DisassemblyModel.cpp b/Userland/DevTools/Profiler/DisassemblyModel.cpp
index 447fb4f125..ee085cfc63 100644
--- a/Userland/DevTools/Profiler/DisassemblyModel.cpp
+++ b/Userland/DevTools/Profiler/DisassemblyModel.cpp
@@ -222,7 +222,7 @@ GUI::Variant DisassemblyModel::data(GUI::ModelIndex const& index, GUI::ModelRole
                 auto const& entry = insn.source_position_with_inlines.source_position.value();
                 builder.appendff("{}:{}", entry.file_path, entry.line_number);
             }
-            return builder.build();
+            return builder.to_deprecated_string();
         }
 
         return {};
diff --git a/Userland/Games/Chess/ChessWidget.cpp b/Userland/Games/Chess/ChessWidget.cpp
index ab61f29436..15d18cc8b2 100644
--- a/Userland/Games/Chess/ChessWidget.cpp
+++ b/Userland/Games/Chess/ChessWidget.cpp
@@ -381,7 +381,7 @@ static RefPtr<Gfx::Bitmap> get_piece(StringView set, StringView image)
     builder.append(set);
     builder.append('/');
     builder.append(image);
-    return Gfx::Bitmap::load_from_file(builder.build()).release_value_but_fixme_should_propagate_errors();
+    return Gfx::Bitmap::load_from_file(builder.to_deprecated_string()).release_value_but_fixme_should_propagate_errors();
 }
 
 void ChessWidget::set_piece_set(StringView set)
diff --git a/Userland/Libraries/LibC/semaphore.cpp b/Userland/Libraries/LibC/semaphore.cpp
index 12d39eb4ee..10a302c638 100644
--- a/Userland/Libraries/LibC/semaphore.cpp
+++ b/Userland/Libraries/LibC/semaphore.cpp
@@ -48,7 +48,7 @@ static ErrorOr<DeprecatedString> sem_name_to_path(char const* name)
     StringBuilder builder;
     TRY(builder.try_append(sem_path_prefix));
     TRY(builder.try_append(name_view));
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 struct NamedSemaphore {
diff --git a/Userland/Libraries/LibC/stdlib.cpp b/Userland/Libraries/LibC/stdlib.cpp
index 9d1ef30d47..a8d2b16bb7 100644
--- a/Userland/Libraries/LibC/stdlib.cpp
+++ b/Userland/Libraries/LibC/stdlib.cpp
@@ -641,7 +641,7 @@ int ptsname_r(int fd, char* buffer, size_t size)
         return -1;
     }
     memset(buffer, 0, devpts_path_builder.length() + 1);
-    auto full_devpts_path_string = devpts_path_builder.build();
+    auto full_devpts_path_string = devpts_path_builder.to_deprecated_string();
     if (!full_devpts_path_string.copy_characters_to_buffer(buffer, size)) {
         errno = ERANGE;
         return -1;
diff --git a/Userland/Libraries/LibC/syslog.cpp b/Userland/Libraries/LibC/syslog.cpp
index d509cd863c..5866b59ca7 100644
--- a/Userland/Libraries/LibC/syslog.cpp
+++ b/Userland/Libraries/LibC/syslog.cpp
@@ -124,7 +124,7 @@ void vsyslog_r(int priority, struct syslog_data* data, char const* message, va_l
         combined.appendff("{}: ", get_syslog_ident(data));
 
     combined.appendvf(message, args);
-    DeprecatedString combined_string = combined.build();
+    auto combined_string = combined.to_deprecated_string();
 
     if (data->logopt & LOG_CONS)
         dbgputstr(combined_string.characters(), combined_string.length());
diff --git a/Userland/Libraries/LibC/time.cpp b/Userland/Libraries/LibC/time.cpp
index a83b440ffb..081dff5967 100644
--- a/Userland/Libraries/LibC/time.cpp
+++ b/Userland/Libraries/LibC/time.cpp
@@ -390,7 +390,7 @@ size_t strftime(char* destination, size_t max_size, char const* format, const st
             return 0;
     }
 
-    auto str = builder.build();
+    auto str = builder.to_deprecated_string();
     bool fits = str.copy_characters_to_buffer(destination, max_size);
     return fits ? str.length() : 0;
 }
diff --git a/Userland/Libraries/LibCards/CardStack.h b/Userland/Libraries/LibCards/CardStack.h
index 8645a031cc..1cdcf23e44 100644
--- a/Userland/Libraries/LibCards/CardStack.h
+++ b/Userland/Libraries/LibCards/CardStack.h
@@ -137,6 +137,6 @@ struct AK::Formatter<Cards::CardStack> : Formatter<FormatString> {
             first_card = false;
         }
 
-        return Formatter<FormatString>::format(builder, "{:<10} {:>16}: {}"sv, type, stack.bounding_box(), cards.build());
+        return Formatter<FormatString>::format(builder, "{:<10} {:>16}: {}"sv, type, stack.bounding_box(), cards.to_deprecated_string());
     }
 };
diff --git a/Userland/Libraries/LibChess/Chess.cpp b/Userland/Libraries/LibChess/Chess.cpp
index 53aeee2501..b036dabc07 100644
--- a/Userland/Libraries/LibChess/Chess.cpp
+++ b/Userland/Libraries/LibChess/Chess.cpp
@@ -82,7 +82,7 @@ DeprecatedString Square::to_algebraic() const
     StringBuilder builder;
     builder.append(file + 'a');
     builder.append(rank + '1');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Move::Move(StringView long_algebraic)
@@ -98,7 +98,7 @@ DeprecatedString Move::to_long_algebraic() const
     builder.append(from.to_algebraic());
     builder.append(to.to_algebraic());
     builder.append(char_for_piece(promote_to).to_lowercase());
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Move Move::from_algebraic(StringView algebraic, const Color turn, Board const& board)
@@ -216,7 +216,7 @@ DeprecatedString Move::to_algebraic() const
     else if (is_check)
         builder.append('+');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Board::Board()
diff --git a/Userland/Libraries/LibChess/UCICommand.cpp b/Userland/Libraries/LibChess/UCICommand.cpp
index 3553ca3b69..a53d7367d8 100644
--- a/Userland/Libraries/LibChess/UCICommand.cpp
+++ b/Userland/Libraries/LibChess/UCICommand.cpp
@@ -105,7 +105,7 @@ DeprecatedString SetOptionCommand::to_deprecated_string() const
         builder.append(value().value());
     }
     builder.append('\n');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 PositionCommand PositionCommand::from_string(StringView command)
@@ -141,7 +141,7 @@ DeprecatedString PositionCommand::to_deprecated_string() const
         builder.append(move.to_long_algebraic());
     }
     builder.append('\n');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 GoCommand GoCommand::from_string(StringView command)
@@ -227,7 +227,7 @@ DeprecatedString GoCommand::to_deprecated_string() const
         builder.append(" infinite"sv);
 
     builder.append('\n');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 StopCommand StopCommand::from_string(StringView command)
@@ -256,9 +256,9 @@ IdCommand IdCommand::from_string(StringView command)
     }
 
     if (tokens[1] == "name") {
-        return IdCommand(Type::Name, value.build());
+        return IdCommand(Type::Name, value.to_deprecated_string());
     } else if (tokens[1] == "author") {
-        return IdCommand(Type::Author, value.build());
+        return IdCommand(Type::Author, value.to_deprecated_string());
     }
     VERIFY_NOT_REACHED();
 }
@@ -274,7 +274,7 @@ DeprecatedString IdCommand::to_deprecated_string() const
     }
     builder.append(value());
     builder.append('\n');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 UCIOkCommand UCIOkCommand::from_string(StringView command)
@@ -317,7 +317,7 @@ DeprecatedString BestMoveCommand::to_deprecated_string() const
     builder.append("bestmove "sv);
     builder.append(move().to_long_algebraic());
     builder.append('\n');
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 InfoCommand InfoCommand::from_string([[maybe_unused]] StringView command)
diff --git a/Userland/Libraries/LibCodeComprehension/Shell/ShellComprehensionEngine.cpp b/Userland/Libraries/LibCodeComprehension/Shell/ShellComprehensionEngine.cpp
index 51cc01b29e..26230ad3b9 100644
--- a/Userland/Libraries/LibCodeComprehension/Shell/ShellComprehensionEngine.cpp
+++ b/Userland/Libraries/LibCodeComprehension/Shell/ShellComprehensionEngine.cpp
@@ -81,7 +81,7 @@ Vector<DeprecatedString> const& ShellComprehensionEngine::DocumentData::sourced_
                         auto name_list = const_cast<::Shell::AST::Node*>(filename.ptr())->run(nullptr)->resolve_as_list(nullptr);
                         StringBuilder builder;
                         builder.join(' ', name_list);
-                        sourced_files.set(builder.build());
+                        sourced_files.set(builder.to_deprecated_string());
                     }
                 }
             }
diff --git a/Userland/Libraries/LibCore/Account.cpp b/Userland/Libraries/LibCore/Account.cpp
index 7f2aaf6324..7c24d07b5c 100644
--- a/Userland/Libraries/LibCore/Account.cpp
+++ b/Userland/Libraries/LibCore/Account.cpp
@@ -39,7 +39,7 @@ static DeprecatedString get_salt()
     auto salt_string = MUST(encode_base64({ random_data, sizeof(random_data) }));
     builder.append(salt_string);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 static Vector<gid_t> get_extra_gids(passwd const& pwd)
@@ -196,7 +196,7 @@ void Account::set_password_enabled(bool enabled)
         StringBuilder builder;
         builder.append('!');
         builder.append(m_password_hash);
-        m_password_hash = builder.build();
+        m_password_hash = builder.to_deprecated_string();
     }
 }
 
diff --git a/Userland/Libraries/LibCore/ArgsParser.cpp b/Userland/Libraries/LibCore/ArgsParser.cpp
index 0c18654dae..76456c0d34 100644
--- a/Userland/Libraries/LibCore/ArgsParser.cpp
+++ b/Userland/Libraries/LibCore/ArgsParser.cpp
@@ -77,7 +77,7 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
     }
     long_options.append({ 0, 0, 0, 0 });
 
-    DeprecatedString short_options = short_options_builder.build();
+    auto short_options = short_options_builder.to_deprecated_string();
 
     while (true) {
         int c = getopt_long(argc, argv, short_options.characters(), long_options.data(), nullptr);
diff --git a/Userland/Libraries/LibCore/DateTime.cpp b/Userland/Libraries/LibCore/DateTime.cpp
index 09e36addf2..add6fca290 100644
--- a/Userland/Libraries/LibCore/DateTime.cpp
+++ b/Userland/Libraries/LibCore/DateTime.cpp
@@ -273,7 +273,7 @@ DeprecatedString DateTime::to_deprecated_string(StringView format) const
         }
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Optional<DateTime> DateTime::parse(StringView format, DeprecatedString const& string)
diff --git a/Userland/Libraries/LibCore/File.cpp b/Userland/Libraries/LibCore/File.cpp
index fb235eb3db..5cf699c625 100644
--- a/Userland/Libraries/LibCore/File.cpp
+++ b/Userland/Libraries/LibCore/File.cpp
@@ -394,7 +394,7 @@ static DeprecatedString get_duplicate_name(DeprecatedString const& path, int dup
     if (!lexical_path.extension().is_empty()) {
         duplicated_name.appendff(".{}", lexical_path.extension());
     }
-    return duplicated_name.build();
+    return duplicated_name.to_deprecated_string();
 }
 
 ErrorOr<void, File::CopyError> File::copy_file_or_directory(DeprecatedString const& dst_path, DeprecatedString const& src_path, RecursionMode recursion_mode, LinkMode link_mode, AddDuplicateFileMarker add_duplicate_file_marker, PreserveMode preserve_mode)
diff --git a/Userland/Libraries/LibCoredump/Backtrace.cpp b/Userland/Libraries/LibCoredump/Backtrace.cpp
index 0ec7527365..54fdfbd221 100644
--- a/Userland/Libraries/LibCoredump/Backtrace.cpp
+++ b/Userland/Libraries/LibCoredump/Backtrace.cpp
@@ -131,7 +131,7 @@ DeprecatedString Backtrace::Entry::to_deprecated_string(bool color) const
     builder.appendff("{:p}: ", eip);
     if (object_name.is_empty()) {
         builder.append("???"sv);
-        return builder.build();
+        return builder.to_deprecated_string();
     }
     builder.appendff("[{}] {}", object_name, function_name.is_empty() ? "???" : function_name);
     builder.append(" ("sv);
@@ -158,7 +158,7 @@ DeprecatedString Backtrace::Entry::to_deprecated_string(bool color) const
 
     builder.append(')');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 }
diff --git a/Userland/Libraries/LibCpp/SemanticSyntaxHighlighter.cpp b/Userland/Libraries/LibCpp/SemanticSyntaxHighlighter.cpp
index 27a7e47ee0..00c46c8307 100644
--- a/Userland/Libraries/LibCpp/SemanticSyntaxHighlighter.cpp
+++ b/Userland/Libraries/LibCpp/SemanticSyntaxHighlighter.cpp
@@ -32,8 +32,8 @@ void SemanticSyntaxHighlighter::rehighlight(Palette const& palette)
         for (Cpp::Token const& token : m_saved_tokens)
             previous_tokens_as_lines.appendff("{}\n", token.type_as_deprecated_string());
 
-        auto previous = previous_tokens_as_lines.build();
-        auto current = current_tokens_as_lines.build();
+        auto previous = previous_tokens_as_lines.to_deprecated_string();
+        auto current = current_tokens_as_lines.to_deprecated_string();
 
         // FIXME: Computing the diff on the entire document's tokens is quite inefficient.
         //        An improvement over this could be only including the tokens that are in edited text ranges in the diff.
diff --git a/Userland/Libraries/LibCrypto/Authentication/HMAC.h b/Userland/Libraries/LibCrypto/Authentication/HMAC.h
index f0f764d26e..3685c908e5 100644
--- a/Userland/Libraries/LibCrypto/Authentication/HMAC.h
+++ b/Userland/Libraries/LibCrypto/Authentication/HMAC.h
@@ -79,7 +79,7 @@ public:
         StringBuilder builder;
         builder.append("HMAC-"sv);
         builder.append(m_inner_hasher.class_name());
-        return builder.build();
+        return builder.to_deprecated_string();
     }
 #endif
 
diff --git a/Userland/Libraries/LibCrypto/Cipher/AES.cpp b/Userland/Libraries/LibCrypto/Cipher/AES.cpp
index 084ca4f659..9f1ca0f2d2 100644
--- a/Userland/Libraries/LibCrypto/Cipher/AES.cpp
+++ b/Userland/Libraries/LibCrypto/Cipher/AES.cpp
@@ -30,7 +30,7 @@ DeprecatedString AESCipherBlock::to_deprecated_string() const
     StringBuilder builder;
     for (auto value : m_data)
         builder.appendff("{:02x}", value);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString AESCipherKey::to_deprecated_string() const
@@ -38,7 +38,7 @@ DeprecatedString AESCipherKey::to_deprecated_string() const
     StringBuilder builder;
     for (size_t i = 0; i < (rounds() + 1) * 4; ++i)
         builder.appendff("{:02x}", m_rd_keys[i]);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 #endif
 
diff --git a/Userland/Libraries/LibCrypto/Cipher/Mode/CBC.h b/Userland/Libraries/LibCrypto/Cipher/Mode/CBC.h
index 0649e64b8a..405a4ffba6 100644
--- a/Userland/Libraries/LibCrypto/Cipher/Mode/CBC.h
+++ b/Userland/Libraries/LibCrypto/Cipher/Mode/CBC.h
@@ -35,7 +35,7 @@ public:
         StringBuilder builder;
         builder.append(this->cipher().class_name());
         builder.append("_CBC"sv);
-        return builder.build();
+        return builder.to_deprecated_string();
     }
 #endif
 
diff --git a/Userland/Libraries/LibCrypto/Cipher/Mode/CTR.h b/Userland/Libraries/LibCrypto/Cipher/Mode/CTR.h
index 982ff0d697..a17bb3514c 100644
--- a/Userland/Libraries/LibCrypto/Cipher/Mode/CTR.h
+++ b/Userland/Libraries/LibCrypto/Cipher/Mode/CTR.h
@@ -110,7 +110,7 @@ public:
         StringBuilder builder;
         builder.append(this->cipher().class_name());
         builder.append("_CTR"sv);
-        return builder.build();
+        return builder.to_deprecated_string();
     }
 #endif
 
diff --git a/Userland/Libraries/LibCrypto/Cipher/Mode/GCM.h b/Userland/Libraries/LibCrypto/Cipher/Mode/GCM.h
index efbdfe0e5c..cb738056ad 100644
--- a/Userland/Libraries/LibCrypto/Cipher/Mode/GCM.h
+++ b/Userland/Libraries/LibCrypto/Cipher/Mode/GCM.h
@@ -50,7 +50,7 @@ public:
         StringBuilder builder;
         builder.append(this->cipher().class_name());
         builder.append("_GCM"sv);
-        return builder.build();
+        return builder.to_deprecated_string();
     }
 #endif
 
diff --git a/Userland/Libraries/LibEDID/EDID.cpp b/Userland/Libraries/LibEDID/EDID.cpp
index d50d896426..566f828915 100644
--- a/Userland/Libraries/LibEDID/EDID.cpp
+++ b/Userland/Libraries/LibEDID/EDID.cpp
@@ -1010,7 +1010,7 @@ DeprecatedString Parser::display_product_name() const
                 break;
             str.append((char)byte);
         }
-        product_name = str.build();
+        product_name = str.to_deprecated_string();
         return IterationDecision::Break;
     });
     if (result.is_error()) {
@@ -1033,7 +1033,7 @@ DeprecatedString Parser::display_product_serial_number() const
                 break;
             str.append((char)byte);
         }
-        product_name = str.build();
+        product_name = str.to_deprecated_string();
         return IterationDecision::Break;
     });
     if (result.is_error()) {
diff --git a/Userland/Libraries/LibGUI/GML/AutocompleteProvider.cpp b/Userland/Libraries/LibGUI/GML/AutocompleteProvider.cpp
index a94fcf32d8..ea5e74be1d 100644
--- a/Userland/Libraries/LibGUI/GML/AutocompleteProvider.cpp
+++ b/Userland/Libraries/LibGUI/GML/AutocompleteProvider.cpp
@@ -118,7 +118,7 @@ void AutocompleteProvider::provide_completions(Function<void(Vector<CodeComprehe
             fuzzy_str_builder.append(character);
             fuzzy_str_builder.append('*');
         }
-        return fuzzy_str_builder.build();
+        return fuzzy_str_builder.to_deprecated_string();
     };
 
     Vector<CodeComprehension::AutocompleteResultEntry> class_entries, identifier_entries;
diff --git a/Userland/Libraries/LibGUI/TextDocument.cpp b/Userland/Libraries/LibGUI/TextDocument.cpp
index 75df12e256..68a4e6bc62 100644
--- a/Userland/Libraries/LibGUI/TextDocument.cpp
+++ b/Userland/Libraries/LibGUI/TextDocument.cpp
@@ -854,7 +854,7 @@ void InsertTextCommand::perform_formatting(TextDocument::Client const& client)
             ++column;
         }
     }
-    m_text = builder.build();
+    m_text = builder.to_deprecated_string();
 }
 
 void InsertTextCommand::redo()
diff --git a/Userland/Libraries/LibGemini/Document.cpp b/Userland/Libraries/LibGemini/Document.cpp
index 8c162ede1a..41794cf7d3 100644
--- a/Userland/Libraries/LibGemini/Document.cpp
+++ b/Userland/Libraries/LibGemini/Document.cpp
@@ -25,7 +25,7 @@ DeprecatedString Document::render_to_html() const
     }
     html_builder.append("</body>"sv);
     html_builder.append("</html>"sv);
-    return html_builder.build();
+    return html_builder.to_deprecated_string();
 }
 
 NonnullRefPtr<Document> Document::parse(StringView lines, const URL& url)
diff --git a/Userland/Libraries/LibGemini/Line.cpp b/Userland/Libraries/LibGemini/Line.cpp
index 8db3ef4156..96ddbb51f1 100644
--- a/Userland/Libraries/LibGemini/Line.cpp
+++ b/Userland/Libraries/LibGemini/Line.cpp
@@ -14,7 +14,7 @@ DeprecatedString Text::render_to_html() const
     StringBuilder builder;
     builder.append(escape_html_entities(m_text));
     builder.append("<br>\n"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Heading::render_to_html() const
@@ -31,7 +31,7 @@ DeprecatedString UnorderedList::render_to_html() const
     builder.append("<li>"sv);
     builder.append(escape_html_entities(m_text.substring_view(1, m_text.length() - 1)));
     builder.append("</li>"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Control::render_to_html() const
@@ -81,7 +81,7 @@ DeprecatedString Link::render_to_html() const
     builder.append("\">"sv);
     builder.append(escape_html_entities(m_name));
     builder.append("</a><br>\n"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Preformatted::render_to_html() const
@@ -90,7 +90,7 @@ DeprecatedString Preformatted::render_to_html() const
     builder.append(escape_html_entities(m_text));
     builder.append('\n');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 }
diff --git a/Userland/Libraries/LibHTTP/Job.cpp b/Userland/Libraries/LibHTTP/Job.cpp
index 920d9ccf2b..37f5a96953 100644
--- a/Userland/Libraries/LibHTTP/Job.cpp
+++ b/Userland/Libraries/LibHTTP/Job.cpp
@@ -371,7 +371,7 @@ void Job::on_socket_connected()
                 builder.append(existing_value.value());
                 builder.append(',');
                 builder.append(value);
-                m_headers.set(name, builder.build());
+                m_headers.set(name, builder.to_deprecated_string());
             } else {
                 m_headers.set(name, value);
             }
diff --git a/Userland/Libraries/LibIDL/IDLParser.cpp b/Userland/Libraries/LibIDL/IDLParser.cpp
index dba2a2d870..3fac6549e7 100644
--- a/Userland/Libraries/LibIDL/IDLParser.cpp
+++ b/Userland/Libraries/LibIDL/IDLParser.cpp
@@ -73,7 +73,7 @@ static DeprecatedString convert_enumeration_value_to_cpp_enum_member(DeprecatedS
         builder.append('_');
 
     names_already_seen.set(builder.string_view());
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 namespace IDL {
diff --git a/Userland/Libraries/LibIMAP/Client.cpp b/Userland/Libraries/LibIMAP/Client.cpp
index 56b4dc822b..f57696564c 100644
--- a/Userland/Libraries/LibIMAP/Client.cpp
+++ b/Userland/Libraries/LibIMAP/Client.cpp
@@ -306,7 +306,7 @@ RefPtr<Promise<Optional<SolidResponse>>> Client::store(StoreMethod method, Seque
     flags_builder.join(' ', flags);
     flags_builder.append(')');
 
-    auto command = Command { uid ? CommandType::UIDStore : CommandType::Store, m_current_command, { sequence_set.serialize(), data_item_name.build(), flags_builder.build() } };
+    auto command = Command { uid ? CommandType::UIDStore : CommandType::Store, m_current_command, { sequence_set.serialize(), data_item_name.to_deprecated_string(), flags_builder.to_deprecated_string() } };
     return cast_promise<SolidResponse>(send_command(move(command)));
 }
 RefPtr<Promise<Optional<SolidResponse>>> Client::search(Optional<DeprecatedString> charset, Vector<SearchKey>&& keys, bool uid)
@@ -363,7 +363,7 @@ RefPtr<Promise<Optional<SolidResponse>>> Client::status(StringView mailbox, Vect
     types_list.append('(');
     types_list.join(' ', args);
     types_list.append(')');
-    auto command = Command { CommandType::Status, m_current_command, { mailbox, types_list.build() } };
+    auto command = Command { CommandType::Status, m_current_command, { mailbox, types_list.to_deprecated_string() } };
     return cast_promise<SolidResponse>(send_command(move(command)));
 }
 
@@ -375,7 +375,7 @@ RefPtr<Promise<Optional<SolidResponse>>> Client::append(StringView mailbox, Mess
         flags_sb.append('(');
         flags_sb.join(' ', flags.value());
         flags_sb.append(')');
-        args.append(flags_sb.build());
+        args.append(flags_sb.to_deprecated_string());
     }
     if (date_time.has_value())
         args.append(date_time.value().to_deprecated_string("\"%d-%b-%Y %H:%M:%S +0000\""sv));
diff --git a/Userland/Libraries/LibIMAP/Objects.cpp b/Userland/Libraries/LibIMAP/Objects.cpp
index ed5dc56578..e3c16821e6 100644
--- a/Userland/Libraries/LibIMAP/Objects.cpp
+++ b/Userland/Libraries/LibIMAP/Objects.cpp
@@ -41,7 +41,7 @@ DeprecatedString FetchCommand::DataItem::Section::serialize() const
             first = false;
         }
         headers_builder.append(')');
-        return headers_builder.build();
+        return headers_builder.to_deprecated_string();
     }
     case SectionType::Text:
         return "TEXT";
@@ -57,7 +57,7 @@ DeprecatedString FetchCommand::DataItem::Section::serialize() const
         if (ends_with_mime) {
             sb.append(".MIME"sv);
         }
-        return sb.build();
+        return sb.to_deprecated_string();
     }
     }
     VERIFY_NOT_REACHED();
@@ -82,7 +82,7 @@ DeprecatedString FetchCommand::DataItem::serialize() const
             sb.appendff("<{}.{}>", start, octets);
         }
 
-        return sb.build();
+        return sb.to_deprecated_string();
     }
     case DataItemType::BodyStructure:
         return "BODYSTRUCTURE";
@@ -111,7 +111,7 @@ DeprecatedString FetchCommand::serialize()
         first = false;
     }
 
-    return AK::DeprecatedString::formatted("{} ({})", sequence_builder.build(), data_items_builder.build());
+    return AK::DeprecatedString::formatted("{} ({})", sequence_builder.to_deprecated_string(), data_items_builder.to_deprecated_string());
 }
 DeprecatedString serialize_astring(StringView string)
 {
@@ -164,7 +164,7 @@ DeprecatedString SearchKey::serialize() const
                 sb.append(item->serialize());
                 first = false;
             }
-            return sb.build();
+            return sb.to_deprecated_string();
         },
         [&](Seen const&) { return DeprecatedString("SEEN"); },
         [&](SentBefore const& x) { return DeprecatedString::formatted("SENTBEFORE {}", x.date.to_deprecated_string("%d-%b-%Y"sv)); },
diff --git a/Userland/Libraries/LibIMAP/Parser.cpp b/Userland/Libraries/LibIMAP/Parser.cpp
index 489ab0e233..d41e3c53d1 100644
--- a/Userland/Libraries/LibIMAP/Parser.cpp
+++ b/Userland/Libraries/LibIMAP/Parser.cpp
@@ -83,7 +83,7 @@ void Parser::parse_response_done()
     }
 
     consume("\r\n"sv);
-    m_response.m_response_text = response_data.build();
+    m_response.m_response_text = response_data.to_deprecated_string();
 }
 
 void Parser::consume(StringView x)
diff --git a/Userland/Libraries/LibJS/AST.cpp b/Userland/Libraries/LibJS/AST.cpp
index 370b675bcf..941e76b043 100644
--- a/Userland/Libraries/LibJS/AST.cpp
+++ b/Userland/Libraries/LibJS/AST.cpp
@@ -3762,7 +3762,7 @@ Completion TemplateLiteral::execute(Interpreter& interpreter) const
     }
 
     // 7. Return the string-concatenation of head, middle, and tail.
-    return Value { PrimitiveString::create(vm, string_builder.build()) };
+    return Value { PrimitiveString::create(vm, string_builder.to_deprecated_string()) };
 }
 
 void TaggedTemplateLiteral::dump(int indent) const
diff --git a/Userland/Libraries/LibJS/Bytecode/Pass/MergeBlocks.cpp b/Userland/Libraries/LibJS/Bytecode/Pass/MergeBlocks.cpp
index 0b25b313f6..fd3a19531c 100644
--- a/Userland/Libraries/LibJS/Bytecode/Pass/MergeBlocks.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Pass/MergeBlocks.cpp
@@ -142,7 +142,7 @@ void MergeBlocks::perform(PassPipelineExecutable& executable)
             builder.append(entry->name());
         }
 
-        auto new_block = BasicBlock::create(builder.build(), size);
+        auto new_block = BasicBlock::create(builder.to_deprecated_string(), size);
         auto& block = *new_block;
         auto first_successor_position = replace_blocks(successors, *new_block);
         VERIFY(first_successor_position.has_value());
diff --git a/Userland/Libraries/LibJS/ParserError.cpp b/Userland/Libraries/LibJS/ParserError.cpp
index ae12e82d56..c790ca5d44 100644
--- a/Userland/Libraries/LibJS/ParserError.cpp
+++ b/Userland/Libraries/LibJS/ParserError.cpp
@@ -32,7 +32,7 @@ DeprecatedString ParserError::source_location_hint(StringView source, char const
     for (size_t i = 0; i < position.value().column - 1; ++i)
         builder.append(spacer);
     builder.append(indicator);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Date.cpp b/Userland/Libraries/LibJS/Runtime/Date.cpp
index 2f38a3aaaa..7a77a8f499 100644
--- a/Userland/Libraries/LibJS/Runtime/Date.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Date.cpp
@@ -57,7 +57,7 @@ DeprecatedString Date::iso_date_string() const
     builder.appendff("{:03}", ms_from_time(m_date_value));
     builder.append('Z');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 // DayWithinYear(t), https://tc39.es/ecma262/#eqn-DayWithinYear
diff --git a/Userland/Libraries/LibJS/Runtime/Error.cpp b/Userland/Libraries/LibJS/Runtime/Error.cpp
index ffde022808..69551c1130 100644
--- a/Userland/Libraries/LibJS/Runtime/Error.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Error.cpp
@@ -95,7 +95,7 @@ DeprecatedString Error::stack_string() const
         }
     }
 
-    return stack_string_builder.build();
+    return stack_string_builder.to_deprecated_string();
 }
 
 #define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType)              \
diff --git a/Userland/Libraries/LibJS/Runtime/GlobalObject.cpp b/Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
index 42b47836f7..d9bc029d2f 100644
--- a/Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
+++ b/Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
@@ -413,7 +413,7 @@ static ThrowCompletionOr<DeprecatedString> encode(VM& vm, DeprecatedString const
             VERIFY(nwritten > 0);
         }
     }
-    return encoded_builder.build();
+    return encoded_builder.to_deprecated_string();
 }
 
 // 19.2.6.1.2 Decode ( string, reservedSet ), https://tc39.es/ecma262/#sec-decode
@@ -471,7 +471,7 @@ static ThrowCompletionOr<DeprecatedString> decode(VM& vm, DeprecatedString const
     }
     if (expected_continuation_bytes > 0)
         return vm.throw_completion<URIError>(ErrorType::URIMalformed);
-    return decoded_builder.build();
+    return decoded_builder.to_deprecated_string();
 }
 
 // 19.2.6.4 encodeURI ( uri ), https://tc39.es/ecma262/#sec-encodeuri-uri
@@ -521,7 +521,7 @@ JS_DEFINE_NATIVE_FUNCTION(GlobalObject::escape)
         }
         escaped.appendff("%u{:04X}", code_point);
     }
-    return PrimitiveString::create(vm, escaped.build());
+    return PrimitiveString::create(vm, escaped.to_deprecated_string());
 }
 
 // B.2.1.2 unescape ( string ), https://tc39.es/ecma262/#sec-unescape-string
@@ -543,7 +543,7 @@ JS_DEFINE_NATIVE_FUNCTION(GlobalObject::unescape)
         }
         unescaped.append_code_point(code_point);
     }
-    return PrimitiveString::create(vm, unescaped.build());
+    return PrimitiveString::create(vm, unescaped.to_deprecated_string());
 }
 
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/DurationFormatPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Intl/DurationFormatPrototype.cpp
index a8600a8f5b..d9d47c11fd 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/DurationFormatPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/DurationFormatPrototype.cpp
@@ -55,7 +55,7 @@ JS_DEFINE_NATIVE_FUNCTION(DurationFormatPrototype::format)
     }
 
     // 7. Return result.
-    return PrimitiveString::create(vm, result.build());
+    return PrimitiveString::create(vm, result.to_deprecated_string());
 }
 
 // 1.4.4 Intl.DurationFormat.prototype.formatToParts ( duration ), https://tc39.es/proposal-intl-duration-format/#sec-Intl.DurationFormat.prototype.formatToParts
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp b/Userland/Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp
index 95f772606e..49e65b20e3 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp
@@ -237,7 +237,7 @@ ThrowCompletionOr<DeprecatedString> format_relative_time(VM& vm, RelativeTimeFor
     }
 
     // 4. Return result.
-    return result.build();
+    return result.to_deprecated_string();
 }
 
 // 17.5.5 FormatRelativeTimeToParts ( relativeTimeFormat, value, unit ), https://tc39.es/ecma402/#sec-FormatRelativeTimeToParts
diff --git a/Userland/Libraries/LibJS/Runtime/RegExpObject.cpp b/Userland/Libraries/LibJS/Runtime/RegExpObject.cpp
index d612c0e48e..8a407c9d6a 100644
--- a/Userland/Libraries/LibJS/Runtime/RegExpObject.cpp
+++ b/Userland/Libraries/LibJS/Runtime/RegExpObject.cpp
@@ -116,7 +116,7 @@ ErrorOr<DeprecatedString, ParseRegexPatternError> parse_regex_pattern(StringView
             builder.append_code_point(code_unit);
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 ThrowCompletionOr<DeprecatedString> parse_regex_pattern(VM& vm, StringView pattern, bool unicode, bool unicode_sets)
diff --git a/Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp b/Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
index 2aa8ea588a..b52cfe7019 100644
--- a/Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
@@ -820,13 +820,13 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
 
     // 15. If nextSourcePosition ≥ lengthS, return accumulatedResult.
     if (next_source_position >= string.length_in_code_units())
-        return PrimitiveString::create(vm, accumulated_result.build());
+        return PrimitiveString::create(vm, accumulated_result.to_deprecated_string());
 
     // 16. Return the string-concatenation of accumulatedResult and the substring of S from nextSourcePosition.
     auto substring = string.substring_view(next_source_position);
     accumulated_result.append(substring);
 
-    return PrimitiveString::create(vm, accumulated_result.build());
+    return PrimitiveString::create(vm, accumulated_result.to_deprecated_string());
 }
 
 // 22.2.5.12 RegExp.prototype [ @@search ] ( string ), https://tc39.es/ecma262/#sec-regexp.prototype-@@search
diff --git a/Userland/Libraries/LibJS/Runtime/StringConstructor.cpp b/Userland/Libraries/LibJS/Runtime/StringConstructor.cpp
index a2eb479bc9..13d5bd9f73 100644
--- a/Userland/Libraries/LibJS/Runtime/StringConstructor.cpp
+++ b/Userland/Libraries/LibJS/Runtime/StringConstructor.cpp
@@ -94,7 +94,7 @@ JS_DEFINE_NATIVE_FUNCTION(StringConstructor::raw)
             builder.append(next_sub);
         }
     }
-    return PrimitiveString::create(vm, builder.build());
+    return PrimitiveString::create(vm, builder.to_deprecated_string());
 }
 
 // 22.1.2.1 String.fromCharCode ( ...codeUnits ), https://tc39.es/ecma262/#sec-string.fromcharcode
diff --git a/Userland/Libraries/LibJS/Token.cpp b/Userland/Libraries/LibJS/Token.cpp
index 74b22461da..c438ee5428 100644
--- a/Userland/Libraries/LibJS/Token.cpp
+++ b/Userland/Libraries/LibJS/Token.cpp
@@ -63,7 +63,7 @@ double Token::double_value() const
         builder.append(ch);
     }
 
-    DeprecatedString value_string = builder.to_deprecated_string();
+    auto value_string = builder.to_deprecated_string();
     if (value_string[0] == '0' && value_string.length() >= 2) {
         if (value_string[1] == 'x' || value_string[1] == 'X') {
             // hexadecimal
diff --git a/Userland/Libraries/LibLine/Editor.cpp b/Userland/Libraries/LibLine/Editor.cpp
index c108f170de..4ee1726c6c 100644
--- a/Userland/Libraries/LibLine/Editor.cpp
+++ b/Userland/Libraries/LibLine/Editor.cpp
@@ -372,7 +372,7 @@ void Editor::insert(const u32 cp)
 {
     StringBuilder builder;
     builder.append(Utf32View(&cp, 1));
-    auto str = builder.build();
+    auto str = builder.to_deprecated_string();
     if (m_pending_chars.try_append(str.characters(), str.length()).is_error())
         return;
 
@@ -1750,7 +1750,7 @@ DeprecatedString Style::to_deprecated_string() const
 
     builder.append('}');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 ErrorOr<void> VT::apply_style(Style const& style, Core::Stream::Stream& stream, bool is_starting)
@@ -2182,7 +2182,7 @@ DeprecatedString Editor::line(size_t up_to_index) const
 {
     StringBuilder builder;
     builder.append(Utf32View { m_buffer.data(), min(m_buffer.size(), up_to_index) });
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 void Editor::remove_at_index(size_t index)
diff --git a/Userland/Libraries/LibLine/InternalFunctions.cpp b/Userland/Libraries/LibLine/InternalFunctions.cpp
index f562542843..32e520baf5 100644
--- a/Userland/Libraries/LibLine/InternalFunctions.cpp
+++ b/Userland/Libraries/LibLine/InternalFunctions.cpp
@@ -36,7 +36,7 @@ void Editor::search_forwards()
     ScopedValueRollback inline_search_cursor_rollback { m_inline_search_cursor };
     StringBuilder builder;
     builder.append(Utf32View { m_buffer.data(), m_inline_search_cursor });
-    DeprecatedString search_phrase = builder.to_deprecated_string();
+    auto search_phrase = builder.to_deprecated_string();
     if (m_search_offset_state == SearchOffsetState::Backwards)
         --m_search_offset;
     if (m_search_offset > 0) {
@@ -63,7 +63,7 @@ void Editor::search_backwards()
     ScopedValueRollback inline_search_cursor_rollback { m_inline_search_cursor };
     StringBuilder builder;
     builder.append(Utf32View { m_buffer.data(), m_inline_search_cursor });
-    DeprecatedString search_phrase = builder.to_deprecated_string();
+    auto search_phrase = builder.to_deprecated_string();
     if (m_search_offset_state == SearchOffsetState::Forwards)
         ++m_search_offset;
     if (search(search_phrase, true)) {
@@ -237,7 +237,7 @@ void Editor::enter_search()
 
             StringBuilder builder;
             builder.append(Utf32View { search_editor.buffer().data(), search_editor.buffer().size() });
-            if (!search(builder.build(), false, false)) {
+            if (!search(builder.to_deprecated_string(), false, false)) {
                 m_chars_touched_in_the_middle = m_buffer.size();
                 m_refresh_needed = true;
                 m_buffer.clear();
diff --git a/Userland/Libraries/LibLocale/DateTimeFormat.cpp b/Userland/Libraries/LibLocale/DateTimeFormat.cpp
index c0310140f1..3e0739b5be 100644
--- a/Userland/Libraries/LibLocale/DateTimeFormat.cpp
+++ b/Userland/Libraries/LibLocale/DateTimeFormat.cpp
@@ -290,7 +290,7 @@ static ErrorOr<Optional<String>> format_time_zone_offset(StringView locale, Cale
     }
 
     // The digits used for hours, minutes and seconds fields in this format are the locale's default decimal digits.
-    auto result = TRY(replace_digits_for_number_system(*number_system, builder.build()));
+    auto result = TRY(replace_digits_for_number_system(*number_system, builder.to_deprecated_string()));
     return TRY(String::from_utf8(formats->gmt_format)).replace("{0}"sv, result, ReplaceMode::FirstOnly);
 }
 
diff --git a/Userland/Libraries/LibMarkdown/BlockQuote.cpp b/Userland/Libraries/LibMarkdown/BlockQuote.cpp
index 191f7a96a6..ac40a2650b 100644
--- a/Userland/Libraries/LibMarkdown/BlockQuote.cpp
+++ b/Userland/Libraries/LibMarkdown/BlockQuote.cpp
@@ -17,7 +17,7 @@ DeprecatedString BlockQuote::render_to_html(bool) const
     builder.append("<blockquote>\n"sv);
     builder.append(m_contents->render_to_html());
     builder.append("</blockquote>\n"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> BlockQuote::render_lines_for_terminal(size_t view_width) const
diff --git a/Userland/Libraries/LibMarkdown/CodeBlock.cpp b/Userland/Libraries/LibMarkdown/CodeBlock.cpp
index 1a2f1e753d..1d388fabca 100644
--- a/Userland/Libraries/LibMarkdown/CodeBlock.cpp
+++ b/Userland/Libraries/LibMarkdown/CodeBlock.cpp
@@ -51,7 +51,7 @@ DeprecatedString CodeBlock::render_to_html(bool) const
 
     builder.append("</pre>\n"sv);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> CodeBlock::render_lines_for_terminal(size_t) const
@@ -174,7 +174,7 @@ OwnPtr<CodeBlock> CodeBlock::parse_backticks(LineIterator& lines, Heading* curre
         builder.append('\n');
     }
 
-    return make<CodeBlock>(language, style, builder.build(), current_section);
+    return make<CodeBlock>(language, style, builder.to_deprecated_string(), current_section);
 }
 
 OwnPtr<CodeBlock> CodeBlock::parse_indent(LineIterator& lines)
@@ -197,6 +197,6 @@ OwnPtr<CodeBlock> CodeBlock::parse_indent(LineIterator& lines)
         builder.append('\n');
     }
 
-    return make<CodeBlock>("", "", builder.build(), nullptr);
+    return make<CodeBlock>("", "", builder.to_deprecated_string(), nullptr);
 }
 }
diff --git a/Userland/Libraries/LibMarkdown/CommentBlock.cpp b/Userland/Libraries/LibMarkdown/CommentBlock.cpp
index 0b07ba7459..b885b32e94 100644
--- a/Userland/Libraries/LibMarkdown/CommentBlock.cpp
+++ b/Userland/Libraries/LibMarkdown/CommentBlock.cpp
@@ -20,7 +20,7 @@ DeprecatedString CommentBlock::render_to_html(bool) const
     // TODO: This is probably incorrect, because we technically need to escape "--" in some form. However, Browser does not care about this.
     builder.append("-->\n"sv);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> CommentBlock::render_lines_for_terminal(size_t) const
@@ -69,7 +69,7 @@ OwnPtr<CommentBlock> CommentBlock::parse(LineIterator& lines)
         line = *lines;
     }
 
-    return make<CommentBlock>(builder.build());
+    return make<CommentBlock>(builder.to_deprecated_string());
 }
 
 }
diff --git a/Userland/Libraries/LibMarkdown/ContainerBlock.cpp b/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
index 5810b8276b..d18fab6b4b 100644
--- a/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
+++ b/Userland/Libraries/LibMarkdown/ContainerBlock.cpp
@@ -37,7 +37,7 @@ DeprecatedString ContainerBlock::render_to_html(bool tight) const
         }
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> ContainerBlock::render_lines_for_terminal(size_t view_width) const
@@ -97,7 +97,7 @@ OwnPtr<ContainerBlock> ContainerBlock::parse(LineIterator& lines)
     auto flush_paragraph = [&] {
         if (paragraph_text.is_empty())
             return;
-        auto paragraph = make<Paragraph>(Text::parse(paragraph_text.build()));
+        auto paragraph = make<Paragraph>(Text::parse(paragraph_text.to_deprecated_string()));
         blocks.append(move(paragraph));
         paragraph_text.clear();
     };
diff --git a/Userland/Libraries/LibMarkdown/Document.cpp b/Userland/Libraries/LibMarkdown/Document.cpp
index df088e326e..6e6ff08041 100644
--- a/Userland/Libraries/LibMarkdown/Document.cpp
+++ b/Userland/Libraries/LibMarkdown/Document.cpp
@@ -35,7 +35,7 @@ DeprecatedString Document::render_to_html(StringView extra_head_contents) const
 </body>
 </html>)~~~"sv);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Document::render_to_inline_html() const
@@ -51,7 +51,7 @@ DeprecatedString Document::render_for_terminal(size_t view_width) const
         builder.append("\n"sv);
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 RecursionDecision Document::walk(Visitor& visitor) const
diff --git a/Userland/Libraries/LibMarkdown/Heading.cpp b/Userland/Libraries/LibMarkdown/Heading.cpp
index e31db29959..1e2b0c3121 100644
--- a/Userland/Libraries/LibMarkdown/Heading.cpp
+++ b/Userland/Libraries/LibMarkdown/Heading.cpp
@@ -32,7 +32,7 @@ Vector<DeprecatedString> Heading::render_lines_for_terminal(size_t) const
         break;
     }
 
-    return Vector<DeprecatedString> { builder.build() };
+    return Vector<DeprecatedString> { builder.to_deprecated_string() };
 }
 
 RecursionDecision Heading::walk(Visitor& visitor) const
diff --git a/Userland/Libraries/LibMarkdown/List.cpp b/Userland/Libraries/LibMarkdown/List.cpp
index ac5a48e221..75f46d2119 100644
--- a/Userland/Libraries/LibMarkdown/List.cpp
+++ b/Userland/Libraries/LibMarkdown/List.cpp
@@ -35,7 +35,7 @@ DeprecatedString List::render_to_html(bool) const
 
     builder.appendff("</{}>\n", tag);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> List::render_lines_for_terminal(size_t view_width) const
@@ -57,13 +57,13 @@ Vector<DeprecatedString> List::render_lines_for_terminal(size_t view_width) cons
 
         builder.append(first_line);
 
-        lines.append(builder.build());
+        lines.append(builder.to_deprecated_string());
 
         for (auto& line : item_lines) {
             builder.clear();
             builder.append(DeprecatedString::repeated(' ', item_indentation));
             builder.append(line);
-            lines.append(builder.build());
+            lines.append(builder.to_deprecated_string());
         }
     }
 
diff --git a/Userland/Libraries/LibMarkdown/Paragraph.cpp b/Userland/Libraries/LibMarkdown/Paragraph.cpp
index afb0d2860d..3ad5e50967 100644
--- a/Userland/Libraries/LibMarkdown/Paragraph.cpp
+++ b/Userland/Libraries/LibMarkdown/Paragraph.cpp
@@ -25,7 +25,7 @@ DeprecatedString Paragraph::render_to_html(bool tight) const
 
     builder.append('\n');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Vector<DeprecatedString> Paragraph::render_lines_for_terminal(size_t) const
diff --git a/Userland/Libraries/LibMarkdown/Table.cpp b/Userland/Libraries/LibMarkdown/Table.cpp
index d1f8b37aab..d526e7acff 100644
--- a/Userland/Libraries/LibMarkdown/Table.cpp
+++ b/Userland/Libraries/LibMarkdown/Table.cpp
@@ -44,12 +44,12 @@ Vector<DeprecatedString> Table::render_lines_for_terminal(size_t view_width) con
         write_aligned(col.header, width, col.alignment);
     }
 
-    lines.append(builder.build());
+    lines.append(builder.to_deprecated_string());
     builder.clear();
 
     for (size_t i = 0; i < view_width; ++i)
         builder.append('-');
-    lines.append(builder.build());
+    lines.append(builder.to_deprecated_string());
     builder.clear();
 
     for (size_t i = 0; i < m_row_count; ++i) {
@@ -65,7 +65,7 @@ Vector<DeprecatedString> Table::render_lines_for_terminal(size_t view_width) con
             size_t width = col.relative_width * unit_width_length;
             write_aligned(cell, width, col.alignment);
         }
-        lines.append(builder.build());
+        lines.append(builder.to_deprecated_string());
         builder.clear();
     }
 
diff --git a/Userland/Libraries/LibMarkdown/Text.cpp b/Userland/Libraries/LibMarkdown/Text.cpp
index 2a410f1976..c5296ebfaa 100644
--- a/Userland/Libraries/LibMarkdown/Text.cpp
+++ b/Userland/Libraries/LibMarkdown/Text.cpp
@@ -266,14 +266,14 @@ DeprecatedString Text::render_to_html() const
 {
     StringBuilder builder;
     m_node->render_to_html(builder);
-    return builder.build().trim(" \n\t"sv);
+    return builder.to_deprecated_string().trim(" \n\t"sv);
 }
 
 DeprecatedString Text::render_for_terminal() const
 {
     StringBuilder builder;
     m_node->render_for_terminal(builder);
-    return builder.build().trim(" \n\t"sv);
+    return builder.to_deprecated_string().trim(" \n\t"sv);
 }
 
 RecursionDecision Text::walk(Visitor& visitor) const
@@ -323,7 +323,7 @@ Vector<Text::Token> Text::tokenize(StringView str)
             return;
 
         tokens.append({
-            current_token.build(),
+            current_token.to_deprecated_string(),
             left_flanking,
             right_flanking,
             punct_before,
@@ -627,7 +627,7 @@ NonnullOwnPtr<Text::Node> Text::parse_link(Vector<Token>::ConstIterator& tokens)
 
         if (*iterator == ")"sv) {
             tokens = iterator;
-            return make<LinkNode>(is_image, move(link_text), address.build().trim_whitespace(), image_width, image_height);
+            return make<LinkNode>(is_image, move(link_text), address.to_deprecated_string().trim_whitespace(), image_width, image_height);
         }
 
         address.append(iterator->data);
diff --git a/Userland/Libraries/LibRegex/RegexMatch.h b/Userland/Libraries/LibRegex/RegexMatch.h
index 670e06e80d..923d550300 100644
--- a/Userland/Libraries/LibRegex/RegexMatch.h
+++ b/Userland/Libraries/LibRegex/RegexMatch.h
@@ -273,7 +273,7 @@ public:
                 StringBuilder builder;
                 for (auto ch : data)
                     builder.append(ch); // Note: The type conversion is intentional.
-                optional_string_storage = builder.build();
+                optional_string_storage = builder.to_deprecated_string();
                 return RegexStringView { T { *optional_string_storage } };
             },
             [&](Utf32View) {
diff --git a/Userland/Libraries/LibRegex/RegexMatcher.cpp b/Userland/Libraries/LibRegex/RegexMatcher.cpp
index bf6571680a..4afe01fa03 100644
--- a/Userland/Libraries/LibRegex/RegexMatcher.cpp
+++ b/Userland/Libraries/LibRegex/RegexMatcher.cpp
@@ -96,7 +96,7 @@ DeprecatedString Regex<Parser>::error_string(Optional<DeprecatedString> message)
         eb.append(' ');
 
     eb.appendff("^---- {}", message.value_or(get_error_string(parser_result.error)));
-    return eb.build();
+    return eb.to_deprecated_string();
 }
 
 template<typename Parser>
diff --git a/Userland/Libraries/LibRegex/RegexParser.cpp b/Userland/Libraries/LibRegex/RegexParser.cpp
index bc6c2fc7d0..136b7a97f2 100644
--- a/Userland/Libraries/LibRegex/RegexParser.cpp
+++ b/Userland/Libraries/LibRegex/RegexParser.cpp
@@ -598,7 +598,7 @@ ALWAYS_INLINE bool PosixExtendedParser::parse_repetition_symbol(ByteCode& byteco
             number_builder.append(consume().value());
         }
 
-        auto maybe_minimum = number_builder.build().to_uint();
+        auto maybe_minimum = number_builder.to_deprecated_string().to_uint();
         if (!maybe_minimum.has_value())
             return set_error(Error::InvalidBraceContent);
 
@@ -627,7 +627,7 @@ ALWAYS_INLINE bool PosixExtendedParser::parse_repetition_symbol(ByteCode& byteco
             number_builder.append(consume().value());
         }
         if (!number_builder.is_empty()) {
-            auto value = number_builder.build().to_uint();
+            auto value = number_builder.to_deprecated_string().to_uint();
             if (!value.has_value() || minimum > value.value() || *value > s_maximum_repetition_count)
                 return set_error(Error::InvalidBraceContent);
 
@@ -2530,7 +2530,7 @@ DeprecatedFlyString ECMA262Parser::read_capture_group_specifier(bool take_starti
         builder.append_code_point(code_point);
     }
 
-    DeprecatedFlyString name = builder.build();
+    DeprecatedFlyString name = builder.to_deprecated_string();
     if (!hit_end || name.is_empty())
         set_error(Error::InvalidNameForCaptureGroup);
 
diff --git a/Userland/Libraries/LibSQL/AST/Expression.cpp b/Userland/Libraries/LibSQL/AST/Expression.cpp
index cd2270577d..e4457e4868 100644
--- a/Userland/Libraries/LibSQL/AST/Expression.cpp
+++ b/Userland/Libraries/LibSQL/AST/Expression.cpp
@@ -211,7 +211,7 @@ ResultOr<Value> MatchExpression::evaluate(ExecutionContext& context) const
         builder.append('$');
 
         // FIXME: We should probably cache this regex.
-        auto regex = Regex<PosixBasic>(builder.build());
+        auto regex = Regex<PosixBasic>(builder.to_deprecated_string());
         auto result = regex.match(lhs_value.to_deprecated_string(), PosixFlags::Insensitive | PosixFlags::Unicode);
         return Value(invert_expression() ? !result.success : result.success);
     }
@@ -226,7 +226,7 @@ ResultOr<Value> MatchExpression::evaluate(ExecutionContext& context) const
             builder.append("Regular expression: "sv);
             builder.append(get_error_string(err));
 
-            return Result { SQLCommand::Unknown, SQLErrorCode::SyntaxError, builder.build() };
+            return Result { SQLCommand::Unknown, SQLErrorCode::SyntaxError, builder.to_deprecated_string() };
         }
 
         auto result = regex.match(lhs_value.to_deprecated_string(), PosixFlags::Insensitive | PosixFlags::Unicode);
diff --git a/Userland/Libraries/LibSQL/AST/Lexer.cpp b/Userland/Libraries/LibSQL/AST/Lexer.cpp
index 5ca6b8fe3f..dfc857ef25 100644
--- a/Userland/Libraries/LibSQL/AST/Lexer.cpp
+++ b/Userland/Libraries/LibSQL/AST/Lexer.cpp
@@ -109,7 +109,7 @@ Token Lexer::next()
         }
     }
 
-    Token token(token_type, current_token.build(),
+    Token token(token_type, current_token.to_deprecated_string(),
         { value_start_line_number, value_start_column_number },
         { m_line_number, m_line_column });
 
diff --git a/Userland/Libraries/LibSQL/Result.cpp b/Userland/Libraries/LibSQL/Result.cpp
index fefa28192a..2a902da869 100644
--- a/Userland/Libraries/LibSQL/Result.cpp
+++ b/Userland/Libraries/LibSQL/Result.cpp
@@ -41,7 +41,7 @@ DeprecatedString Result::error_string() const
         builder.append(error_description);
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 }
diff --git a/Userland/Libraries/LibSQL/TreeNode.cpp b/Userland/Libraries/LibSQL/TreeNode.cpp
index 9f2f74d5b9..b17da4902c 100644
--- a/Userland/Libraries/LibSQL/TreeNode.cpp
+++ b/Userland/Libraries/LibSQL/TreeNode.cpp
@@ -364,7 +364,7 @@ void TreeNode::dump_if(int flag, DeprecatedString&& msg)
         builder.append(", leaf"sv);
     }
     builder.append(')');
-    dbgln(builder.build());
+    dbgln(builder.to_deprecated_string());
 }
 
 void TreeNode::list_node(int indent)
diff --git a/Userland/Libraries/LibSQL/Tuple.cpp b/Userland/Libraries/LibSQL/Tuple.cpp
index 5fcc5fbdfb..3c92103ac8 100644
--- a/Userland/Libraries/LibSQL/Tuple.cpp
+++ b/Userland/Libraries/LibSQL/Tuple.cpp
@@ -173,7 +173,7 @@ DeprecatedString Tuple::to_deprecated_string() const
     if (pointer() != 0) {
         builder.appendff(":{}", pointer());
     }
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 void Tuple::copy_from(Tuple const& other)
diff --git a/Userland/Libraries/LibSQL/Value.cpp b/Userland/Libraries/LibSQL/Value.cpp
index 789e14623a..1cbb2be685 100644
--- a/Userland/Libraries/LibSQL/Value.cpp
+++ b/Userland/Libraries/LibSQL/Value.cpp
@@ -221,7 +221,7 @@ DeprecatedString Value::to_deprecated_string() const
             builder.join(',', value.values);
             builder.append(')');
 
-            return builder.build();
+            return builder.to_deprecated_string();
         });
 }
 
diff --git a/Userland/Libraries/LibTLS/Certificate.h b/Userland/Libraries/LibTLS/Certificate.h
index fdab883c27..d56e5abb20 100644
--- a/Userland/Libraries/LibTLS/Certificate.h
+++ b/Userland/Libraries/LibTLS/Certificate.h
@@ -92,7 +92,7 @@ public:
             cert_name.append("/CN="sv);
             cert_name.append(subject.subject);
         }
-        return cert_name.build();
+        return cert_name.to_deprecated_string();
     }
 
     DeprecatedString issuer_identifier_string() const
@@ -122,7 +122,7 @@ public:
             cert_name.append("/CN="sv);
             cert_name.append(issuer.subject);
         }
-        return cert_name.build();
+        return cert_name.to_deprecated_string();
     }
 };
 
diff --git a/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp b/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
index 43241d34dd..56ba3e5b6e 100644
--- a/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
+++ b/Userland/Libraries/LibWeb/DOM/DOMTokenList.cpp
@@ -229,7 +229,7 @@ DeprecatedString DOMTokenList::value() const
 {
     StringBuilder builder;
     builder.join(' ', m_token_set);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 // https://dom.spec.whatwg.org/#ref-for-concept-element-attributes-set-value%E2%91%A2
diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 3c62d54765..d575117498 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -386,7 +386,7 @@ WebIDL::ExceptionOr<void> Document::write(Vector<DeprecatedString> const& string
     StringBuilder builder;
     builder.join(""sv, strings);
 
-    return run_the_document_write_steps(builder.build());
+    return run_the_document_write_steps(builder.to_deprecated_string());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-writeln
@@ -396,7 +396,7 @@ WebIDL::ExceptionOr<void> Document::writeln(Vector<DeprecatedString> const& stri
     builder.join(""sv, strings);
     builder.append("\n"sv);
 
-    return run_the_document_write_steps(builder.build());
+    return run_the_document_write_steps(builder.to_deprecated_string());
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#document-write-steps
diff --git a/Userland/Libraries/LibWeb/DOM/Node.cpp b/Userland/Libraries/LibWeb/DOM/Node.cpp
index 5da4574a65..5c3f757812 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Node.cpp
@@ -270,7 +270,7 @@ DeprecatedString Node::child_text_content() const
         if (is<Text>(child))
             builder.append(verify_cast<Text>(child).text_content());
     });
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 // https://dom.spec.whatwg.org/#concept-tree-root
diff --git a/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp b/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp
index b6862eb63e..9dd59d8996 100644
--- a/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp
+++ b/Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp
@@ -147,7 +147,7 @@ ErrorOr<Optional<Vector<DeprecatedString>>> get_decode_and_split_header_value(Re
         }
 
         // 3. Remove all HTTP tab or space from the start and end of temporaryValue.
-        auto temporary_value = temporary_value_builder.build().trim(HTTP_TAB_OR_SPACE, TrimMode::Both);
+        auto temporary_value = temporary_value_builder.to_deprecated_string().trim(HTTP_TAB_OR_SPACE, TrimMode::Both);
 
         // 4. Append temporaryValue to values.
         values.append(move(temporary_value));
diff --git a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
index 1b41e9d448..662df94c8b 100644
--- a/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
+++ b/Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
@@ -420,7 +420,7 @@ CanvasRenderingContext2D::PreparedText CanvasRenderingContext2D::prepare_text(De
     for (auto c : text) {
         builder.append(Infra::is_ascii_whitespace(c) ? ' ' : c);
     }
-    DeprecatedString replaced_text = builder.build();
+    auto replaced_text = builder.to_deprecated_string();
 
     // 3. Let font be the current font of target, as given by that object's font attribute.
     // FIXME: Once we have CanvasTextDrawingStyles, implement font selection.
diff --git a/Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp b/Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp
index aa4c066193..50864bb915 100644
--- a/Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Parser/HTMLTokenizer.cpp
@@ -2816,7 +2816,7 @@ void HTMLTokenizer::insert_input_at_insertion_point(DeprecatedString const& inpu
     builder.append(m_decoded_input.substring(0, m_insertion_point.position));
     builder.append(input);
     builder.append(m_decoded_input.substring(m_insertion_point.position));
-    m_decoded_input = builder.build();
+    m_decoded_input = builder.to_deprecated_string();
 
     m_utf8_view = Utf8View(m_decoded_input);
     m_utf8_iterator = m_utf8_view.iterator_at_byte_offset(utf8_iterator_byte_offset);
diff --git a/Userland/Libraries/LibWeb/WebAssembly/WebAssemblyObject.cpp b/Userland/Libraries/LibWeb/WebAssembly/WebAssemblyObject.cpp
index e7557025c1..6e3858fddd 100644
--- a/Userland/Libraries/LibWeb/WebAssembly/WebAssemblyObject.cpp
+++ b/Userland/Libraries/LibWeb/WebAssembly/WebAssemblyObject.cpp
@@ -284,7 +284,7 @@ JS::ThrowCompletionOr<size_t> WebAssemblyObject::instantiate_module(JS::VM& vm,
         StringBuilder builder;
         builder.append("LinkError: Missing "sv);
         builder.join(' ', link_result.error().missing_imports);
-        return vm.throw_completion<JS::TypeError>(builder.build());
+        return vm.throw_completion<JS::TypeError>(builder.to_deprecated_string());
     }
 
     auto instance_result = s_abstract_machine.instantiate(module, link_result.release_value());
diff --git a/Userland/Services/DHCPClient/DHCPv4.h b/Userland/Services/DHCPClient/DHCPv4.h
index 239468f7a4..87b6d28abd 100644
--- a/Userland/Services/DHCPClient/DHCPv4.h
+++ b/Userland/Services/DHCPClient/DHCPv4.h
@@ -163,7 +163,7 @@ struct ParsedDHCPv4Options {
                 builder.appendff(" {} ", ((u8 const*)opt.value.value)[i]);
             builder.append('\n');
         }
-        return builder.build();
+        return builder.to_deprecated_string();
     }
 
     struct DHCPOptionValue {
diff --git a/Userland/Services/LaunchServer/Launcher.cpp b/Userland/Services/LaunchServer/Launcher.cpp
index e59c271186..1c0be751c0 100644
--- a/Userland/Services/LaunchServer/Launcher.cpp
+++ b/Userland/Services/LaunchServer/Launcher.cpp
@@ -64,7 +64,7 @@ DeprecatedString Handler::to_details_str() const
         break;
     }
     MUST(obj.finish());
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Launcher::Launcher()
diff --git a/Userland/Shell/AST.cpp b/Userland/Shell/AST.cpp
index 6f7704fdff..55522038b6 100644
--- a/Userland/Shell/AST.cpp
+++ b/Userland/Shell/AST.cpp
@@ -198,7 +198,7 @@ static DeprecatedString resolve_slices(RefPtr<Shell> shell, DeprecatedString&& i
         for (auto& index : indices)
             builder.append(input_value[index]);
 
-        input_value = builder.build();
+        input_value = builder.to_deprecated_string();
     }
 
     return move(input_value);
diff --git a/Userland/Shell/Builtin.cpp b/Userland/Shell/Builtin.cpp
index 770da10c41..ec45f90711 100644
--- a/Userland/Shell/Builtin.cpp
+++ b/Userland/Shell/Builtin.cpp
@@ -317,9 +317,9 @@ int Shell::builtin_type(int argc, char const** argv)
                 if (fn.body) {
                     auto formatter = Formatter(*fn.body);
                     builder.append(formatter.format());
-                    printf("%s\n}\n", builder.build().characters());
+                    printf("%s\n}\n", builder.to_deprecated_string().characters());
                 } else {
-                    printf("%s\n}\n", builder.build().characters());
+                    printf("%s\n}\n", builder.to_deprecated_string().characters());
                 }
             }
             continue;
diff --git a/Userland/Shell/ImmediateFunctions.cpp b/Userland/Shell/ImmediateFunctions.cpp
index 93e89186e2..1ec7d5cf2e 100644
--- a/Userland/Shell/ImmediateFunctions.cpp
+++ b/Userland/Shell/ImmediateFunctions.cpp
@@ -345,7 +345,7 @@ RefPtr<AST::Node> Shell::immediate_split(AST::ImmediateExpression& invoking_node
             StringBuilder builder;
             for (auto code_point : Utf8View { value }) {
                 builder.append_code_point(code_point);
-                split_strings.append(builder.build());
+                split_strings.append(builder.to_deprecated_string());
                 builder.clear();
             }
         } else {
diff --git a/Userland/Shell/Parser.cpp b/Userland/Shell/Parser.cpp
index f299260c1f..43ec26b497 100644
--- a/Userland/Shell/Parser.cpp
+++ b/Userland/Shell/Parser.cpp
@@ -217,7 +217,7 @@ Parser::SequenceParseResult Parser::parse_sequence()
                                 error_builder.appendff(", {} (at {}:{})", entry.end, entry.node->position().start_line.line_column, entry.node->position().start_line.line_number);
                             first = false;
                         }
-                        left.append(create<AST::SyntaxError>(error_builder.build(), true));
+                        left.append(create<AST::SyntaxError>(error_builder.to_deprecated_string(), true));
                         // Just read the rest of the newlines
                         goto discard_terminators;
                     }
diff --git a/Userland/Shell/Shell.cpp b/Userland/Shell/Shell.cpp
index 3a74789ec0..fa349cb68f 100644
--- a/Userland/Shell/Shell.cpp
+++ b/Userland/Shell/Shell.cpp
@@ -846,7 +846,7 @@ ErrorOr<RefPtr<Job>> Shell::run_command(const AST::Command& command)
     // as the child will run this chain.
     if (command.should_immediately_execute_next)
         command_copy.next_chain.clear();
-    auto job = Job::create(child, pgid, cmd.build(), find_last_job_id() + 1, move(command_copy));
+    auto job = Job::create(child, pgid, cmd.to_deprecated_string(), find_last_job_id() + 1, move(command_copy));
     jobs.set((u64)child, job);
 
     job->on_exit = [this](auto job) {
@@ -1159,7 +1159,7 @@ DeprecatedString Shell::escape_token_for_single_quotes(StringView token)
     if (started_single_quote)
         builder.append("'"sv);
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Shell::escape_token_for_double_quotes(StringView token)
@@ -1185,7 +1185,7 @@ DeprecatedString Shell::escape_token_for_double_quotes(StringView token)
 
     builder.append('"');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 Shell::SpecialCharacterEscapeMode Shell::special_character_escape_mode(u32 code_point, EscapeMode mode)
@@ -1290,7 +1290,7 @@ static DeprecatedString do_escape(Shell::EscapeMode escape_mode, auto& token)
         }
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 DeprecatedString Shell::escape_token(Utf32View token, EscapeMode escape_mode)
@@ -1333,7 +1333,7 @@ DeprecatedString Shell::unescape_token(StringView token)
     if (state == Escaped)
         builder.append('\\');
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 void Shell::cache_path()
@@ -1477,7 +1477,7 @@ Vector<Line::CompletionSuggestion> Shell::complete_path(StringView base, StringV
         path_builder.append('/');
         path_builder.append(init_slash_part);
     }
-    path = path_builder.build();
+    path = path_builder.to_deprecated_string();
     token = last_slash_part;
 
     // the invariant part of the token is actually just the last segment
@@ -1745,7 +1745,7 @@ ErrorOr<Vector<Line::CompletionSuggestion>> Shell::complete_via_program_itself(s
             auto list = pop_list();
             StringBuilder builder;
             builder.join(""sv, list);
-            this->list().append(builder.build());
+            this->list().append(builder.to_deprecated_string());
         }
 
         virtual void visit(AST::Glob const* node) override
@@ -1764,7 +1764,7 @@ ErrorOr<Vector<Line::CompletionSuggestion>> Shell::complete_via_program_itself(s
             auto list = pop_list();
             StringBuilder builder;
             builder.join(""sv, list);
-            this->list().append(builder.build());
+            this->list().append(builder.to_deprecated_string());
         }
 
         virtual void visit(AST::ImmediateExpression const* node) override
@@ -1813,7 +1813,7 @@ ErrorOr<Vector<Line::CompletionSuggestion>> Shell::complete_via_program_itself(s
                 for (auto& right_entry : right) {
                     builder.append(left_entry);
                     builder.append(right_entry);
-                    list().append(builder.build());
+                    list().append(builder.to_deprecated_string());
                     builder.clear();
                 }
             }
diff --git a/Userland/Utilities/diff.cpp b/Userland/Utilities/diff.cpp
index b15a2f9bb4..9ec39cabe1 100644
--- a/Userland/Utilities/diff.cpp
+++ b/Userland/Utilities/diff.cpp
@@ -54,7 +54,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         if (num_added > 1)
             sb.appendff(",{}", target_start + num_added - 1);
 
-        outln("Hunk: {}", sb.build());
+        outln("Hunk: {}", sb.to_deprecated_string());
         for (auto const& line : hunk.removed_lines) {
             if (color_output)
                 outln("\033[31;1m< {}\033[0m", line);
diff --git a/Userland/Utilities/echo.cpp b/Userland/Utilities/echo.cpp
index a368d13e0d..5eb71c9f29 100644
--- a/Userland/Utilities/echo.cpp
+++ b/Userland/Utilities/echo.cpp
@@ -94,7 +94,7 @@ static DeprecatedString interpret_backslash_escapes(StringView string, bool& no_
         }
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 ErrorOr<int> serenity_main(Main::Arguments arguments)
diff --git a/Userland/Utilities/expr.cpp b/Userland/Utilities/expr.cpp
index a49f90ade0..2af361b66c 100644
--- a/Userland/Utilities/expr.cpp
+++ b/Userland/Utilities/expr.cpp
@@ -421,7 +421,7 @@ private:
                 for (auto& e : match.capture_group_matches[0])
                     result.append(e.view.string_view());
 
-                return result.build();
+                return result.to_deprecated_string();
             }
         }
 
diff --git a/Userland/Utilities/js.cpp b/Userland/Utilities/js.cpp
index e253dd3faf..1a358fcad1 100644
--- a/Userland/Utilities/js.cpp
+++ b/Userland/Utilities/js.cpp
@@ -110,7 +110,7 @@ static DeprecatedString prompt_for_level(int level)
     for (auto i = 0; i < level; ++i)
         prompt_builder.append("    "sv);
 
-    return prompt_builder.build();
+    return prompt_builder.to_deprecated_string();
 }
 
 static DeprecatedString read_next_piece()
diff --git a/Userland/Utilities/less.cpp b/Userland/Utilities/less.cpp
index 358b933d00..eb594cef82 100644
--- a/Userland/Utilities/less.cpp
+++ b/Userland/Utilities/less.cpp
@@ -565,28 +565,28 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
             } else if (sequence == "j" || sequence == "\e[B" || sequence == "\n") {
                 if (!emulate_more) {
                     if (!modifier_buffer.is_empty())
-                        pager.down_n(modifier_buffer.build().to_uint().value_or(1));
+                        pager.down_n(modifier_buffer.to_deprecated_string().to_uint().value_or(1));
                     else
                         pager.down();
                 }
             } else if (sequence == "k" || sequence == "\e[A") {
                 if (!emulate_more) {
                     if (!modifier_buffer.is_empty())
-                        pager.up_n(modifier_buffer.build().to_uint().value_or(1));
+                        pager.up_n(modifier_buffer.to_deprecated_string().to_uint().value_or(1));
                     else
                         pager.up();
                 }
             } else if (sequence == "g") {
                 if (!emulate_more) {
                     if (!modifier_buffer.is_empty())
-                        pager.go_to_line(modifier_buffer.build().to_uint().value());
+                        pager.go_to_line(modifier_buffer.to_deprecated_string().to_uint().value());
                     else
                         pager.top();
                 }
             } else if (sequence == "G") {
                 if (!emulate_more) {
                     if (!modifier_buffer.is_empty())
-                        pager.go_to_line(modifier_buffer.build().to_uint().value());
+                        pager.go_to_line(modifier_buffer.to_deprecated_string().to_uint().value());
                     else
                         pager.bottom();
                 }
diff --git a/Userland/Utilities/markdown-check.cpp b/Userland/Utilities/markdown-check.cpp
index 4896a108e5..2259e20db4 100644
--- a/Userland/Utilities/markdown-check.cpp
+++ b/Userland/Utilities/markdown-check.cpp
@@ -112,7 +112,7 @@ public:
     StringCollector() = default;
     virtual ~StringCollector() = default;
 
-    DeprecatedString build() { return m_builder.build(); }
+    DeprecatedString build() { return m_builder.to_deprecated_string(); }
 
     static DeprecatedString from(Markdown::Heading const& heading)
     {
diff --git a/Userland/Utilities/mkdir.cpp b/Userland/Utilities/mkdir.cpp
index 30a3c1eb92..d464aa2a36 100644
--- a/Userland/Utilities/mkdir.cpp
+++ b/Userland/Utilities/mkdir.cpp
@@ -63,7 +63,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
             auto& part = parts[idx];
 
             path_builder.append(part);
-            auto path = path_builder.build();
+            auto path = path_builder.to_deprecated_string();
 
             struct stat st;
             if (stat(path.characters(), &st) < 0) {
diff --git a/Userland/Utilities/printf.cpp b/Userland/Utilities/printf.cpp
index c20aef7429..8051465e12 100644
--- a/Userland/Utilities/printf.cpp
+++ b/Userland/Utilities/printf.cpp
@@ -252,7 +252,7 @@ static DeprecatedString handle_escapes(char const* string)
                     builder.append('\b');
                     break;
                 case 'c':
-                    return builder.build();
+                    return builder.to_deprecated_string();
                 case 'e':
                     builder.append('\e');
                     break;
@@ -288,7 +288,7 @@ static DeprecatedString handle_escapes(char const* string)
         }
     }
 
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 ErrorOr<int> serenity_main(Main::Arguments arguments)
diff --git a/Userland/Utilities/sql.cpp b/Userland/Utilities/sql.cpp
index 574118c1b6..cb5c599e22 100644
--- a/Userland/Utilities/sql.cpp
+++ b/Userland/Utilities/sql.cpp
@@ -87,7 +87,7 @@ public:
         m_sql_client->on_next_result = [](auto, auto, auto row) {
             StringBuilder builder;
             builder.join(", "sv, row);
-            outln("{}", builder.build());
+            outln("{}", builder.to_deprecated_string());
         };
 
         m_sql_client->on_results_exhausted = [this](auto, auto, auto total_rows) {
@@ -299,7 +299,7 @@ private:
         for (auto i = 0; i < level; ++i)
             prompt_builder.append("    "sv);
 
-        return prompt_builder.build();
+        return prompt_builder.to_deprecated_string();
     }
 
     bool handle_command(StringView command)
diff --git a/Userland/Utilities/tail.cpp b/Userland/Utilities/tail.cpp
index 2f71f45318..382449957e 100644
--- a/Userland/Utilities/tail.cpp
+++ b/Userland/Utilities/tail.cpp
@@ -86,7 +86,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
                 line.append(ch);
                 if (ch == '\n') {
                     if (wanted_line_count > line_count || line_index >= line_count - wanted_line_count)
-                        out("{}", line.build());
+                        out("{}", line.to_deprecated_string());
                     line_index++;
                     line.clear();
                 }
diff --git a/Userland/Utilities/tree.cpp b/Userland/Utilities/tree.cpp
index 47fe53e34f..27755dfcdf 100644
--- a/Userland/Utilities/tree.cpp
+++ b/Userland/Utilities/tree.cpp
@@ -73,7 +73,7 @@ static void print_directory_tree(DeprecatedString const& root_path, int depth, D
             builder.append('/');
         }
         builder.append(name);
-        DeprecatedString full_path = builder.to_deprecated_string();
+        auto full_path = builder.to_deprecated_string();
 
         struct stat st;
         int rc = lstat(full_path.characters(), &st);
diff --git a/Userland/Utilities/useradd.cpp b/Userland/Utilities/useradd.cpp
index f84e4c19ea..4767562f7c 100644
--- a/Userland/Utilities/useradd.cpp
+++ b/Userland/Utilities/useradd.cpp
@@ -142,7 +142,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         builder.append("$5$"sv);
         builder.append(TRY(encode_base64({ random_data, sizeof(random_data) })));
 
-        return builder.build();
+        return builder.to_deprecated_string();
     };
 
     char* hash = crypt(password.characters(), TRY(get_salt()).characters());
diff --git a/Userland/Utilities/watch.cpp b/Userland/Utilities/watch.cpp
index af36a8e982..9adfbe68c0 100644
--- a/Userland/Utilities/watch.cpp
+++ b/Userland/Utilities/watch.cpp
@@ -34,7 +34,7 @@ static DeprecatedString build_header_string(Vector<char const*> const& command,
     builder.appendff("Every {}.{}s: \x1b[1m", interval.tv_sec, interval.tv_usec / 100000);
     builder.join(' ', command);
     builder.append("\x1b[0m"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 static DeprecatedString build_header_string(Vector<char const*> const& command, Vector<DeprecatedString> const& filenames)
@@ -43,7 +43,7 @@ static DeprecatedString build_header_string(Vector<char const*> const& command,
     builder.appendff("Every time any of {} changes: \x1b[1m", filenames);
     builder.join(' ', command);
     builder.append("\x1b[0m"sv);
-    return builder.build();
+    return builder.to_deprecated_string();
 }
 
 static struct timeval get_current_time()