(1) OP said "we're reaching the point" which is clearly a nod to the maturing TypeScript ecosystem, which is why they changed their opinion over time. I've also changed mine for the same reason.

(2) Sometimes there are such massive benefits that downsides are almost irrelevant. TS has instantly saved me from hundreds of bugs, some of them nasty, and only caused me grief a few times. There are few downsides. I agree with OP that as a default, TS should be used over untyped JS in professional environments.