I was an expert on JS way before TypeScript. I was kind of slow to adopt it because "the type hints are optimized away and can't even be used to boost runtime performance", but when I did start using it, I loved it and wish I had earlier.

The linked article says the vast majority love TypeScript, too.

I think the real dividing line is probably that people who haven't had to maintain a large project hate TypeScript.

(Which is still weird to me, because you can just turn off `no-implicit-any` and get all the benefits without drawbacks.)