The ECMA improvements are nice but imo it's too hard to manage large Javascript programs, or Typescript wouldn't have such a large following.

Good point.

I'm using TypeScript and JavaScript interchangably.

I know JavaScript like the back of my hand, so TypeScript isn't telling me much new, but the static type checking allows me to keep less of that knowledge in working memory. Pretty awesome language!

Rust is hardly omnipresent. I understand it has trouble with lesser used architectures and operating systems. While yes you probably dont use them, they do still exist.