You're right. The typed buffer locals optimization keeps TypeScript semantics intact by exploiting the existing Buffer/Uint8Array type annotation to skip the Na

You're right. The typed buffer locals optimization keeps TypeScript semantics intact by exploiting the existing Buffer/Uint8Array type annotation to skip the NaN-unbox. It's not dropping types, it's using them. The floor I described applies to any-typed paths where static type info isn't available. For well-typed TypeScript, the roadmap shows the gap closes without semantic changes.