No. It is useful in almost every environment other than things like REPL. I can write TypeScript for hours without writing any tests, run it and fix a few minor

No. It is useful in almost every environment other than things like REPL. I can write TypeScript for hours without writing any tests, run it and fix a few minor logic bugs and code is production level, which is great for prototyping. No chance with plain JavaScript without typing -- it would be at least a day or two and I would constantly run into stupid typos or other errors that can only be found at runtime.