By far? You really think the majority of websites are using TS-generated JS? The majority of the web is Wordpress and PHP frameworks. TS has only become 'popular' rather recently, and there's still a TON of websites that are full-stack SSR with only modest amounts of JS.

As for tooling, maybe. VS has always had a decent amount of mind-share. Even then though, I can see Jetbrains + Eclipse + Sublime + Emacs + Vim + others capturing at least 50% combined...