First, I work on Chime.

I agree that language-specific tools can seem like a funny choice. But, it's just really hard to support one language well. This is probably why jetbrains does what it does. Of course, they surely have a large shared base, but tooling customized for one language and environment can work well.

We haven't discounted the possibility of expanding to other languages, but the general editor market is so well served that specialized tools just seemed like a better fit for what we were trying to do.