Awesome! I agree that your intended experience is likely to be more curated, but supporting other languages might really help. This is really cool to hear.

Also, I realize I might have phrased it poorly, but I meant exactly that about the language server. Language server once, but each editor needs its own extension. Even the extension wrappers around the language server could quickly eat up a lot of maintenance time because there is no true standard. Open VSX is pretty nice for cross editor extensions, but not too many editors use it, yet.