Can't say I generally agree with dropping TS for JS but I suppose it's easier to argue when you are working on smaller projects. But here is someone that agrees with you with less qualification than that https://world.hey.com/dhh/turbo-8-is-dropping-typescript-701...

I was introduced to this decision from the Lex Fridman/DHH podcast. He talked a lot about typescript making meta programming very hard. I can see how that would be the case but I don't really understand what sort of meta programming you can do with JS. The general dynamic-ness of it I get.