Comment by methodical

Ditto. If anything, trying to add it into an existing codebase via JSDoc has only really been a detriment via being a massive time sink. It might have caught maybe 4-5 bugs in the code but none that presented a large enough issue to warrant the time investment. If you're starting from scratch with TS instead of JSDoc, it might be worth it, but even on the best of days trying to figure out typing oddities from library typings being wrong and such have only really added headache. As always YMMV