I disagree that performance always matters. I don't pre-optimize. If I can create better UX by focusing on performance, I will. Currently my front ends are so light that a human can't tell the difference.

I don't use Visual Studio either. VS Code is based on Atom, and it has great TypeScript support. I use WebStorm, which is a better IDE overall right now.

I understand people not wanting to transpile, and it does suck that JS forces so many of us to do it.