After being an early adopter of TypeScript, I decided to skip TypeScript in my next projects for a few years because I thought it was not worth the hassle. I remember spending a lot of time in DefinitelyTyped to create and fix type definitions, and when Babel and ES6 were popular I used that instead.

I recently changed my mind and started to migrate a large JavaScript codebase to TypeScript, in strict mode. I consider my team to be composed of only good developers but still, I found so many bugs. I still spend time on DefinitelyTyped definitions, but if you do more than prototyping or work on a project also developed with other people for more than a few weeks, TypeScript is for sure worth it in my opinion.