TypeScript 7.0 ships Go compiler rewrite

Rewriting a major JavaScript tool in Go or Rust is the defining trend of the modern JS ecosystem, but doing so for TypeScript's core compiler is a massive engineering feat that will dramatically improve developer productivity. The 8x to 12x speedup in type-checking addresses one of TypeScript's biggest historical pain points: slow build and compilation times on large codebases. Moving to Go enables native parallelization, paving the way for multi-core scaling via the new checkers flag. Finally, enabling strict mode by default signals Microsoft's push to solidify type safety as the standard rather than an opt-in configuration.