>It's easy to just strip the TS metadata and you're left with working JS.
This actually touches on one of ReScript's supposed unique selling points amongst the functional compile-to-JS languages. Namely that the JS its compiler generates is so clean and readable that, if you end up deciding you don't want to bother with ReScript any more, you can just take the output from the final time you ran the compiler and treat that as a plain JS codebase to continue working on. Exactly how true that is, I don't know.
This actually touches on one of ReScript's supposed unique selling points amongst the functional compile-to-JS languages. Namely that the JS its compiler generates is so clean and readable that, if you end up deciding you don't want to bother with ReScript any more, you can just take the output from the final time you ran the compiler and treat that as a plain JS codebase to continue working on. Exactly how true that is, I don't know.