I remember thinking the same about a bunch of friends I know who were working at early GitHub. What are you all doing build a replacement Campfire? Omg, now there's a team building an IDE because they don't like Textmate? And dozens of similar ones I've forgotten over the years. But both of those lead to Electron, and Atom, and ultimately VSCode. Which given they ultimately ended up at MSFT probably didn't hurt when the acquisition conversations started.