Well, TS is just JS with strong typing and type annotations. It’s almost the same language, just adding guard-rails and safety checks that the base language doesn’t have.

There’s a bit of fiddling with configuration and using npm, but it’s not much overhead. There’s plenty of tsconfig settings to customize the process for your need, but most the defaults are quite sane.

Entirely depends on your skillset and company. That might be true somewhere, but seems strange.

I do recommend you pick up typescript though. It will forcibly teach you some good habits, expectations, and some more base understanding of what you’re actually doing.