While gaining popularity, JS + JSDoc is misguided and not a solution. The compiler is what is required to actually enforce standards within a team - otherwise what you have is a completely informal process.

I don't think type docs are useless - on the contrary, they are super helpful while migrating. But I think this trend is indicative of a different issue - what we are really seeing is more of a protest that JS needs native optional type support as soon as possible.