Had a look at the About page, and the live coding feature does sound useful. I'm sure the guys are excited; it's a fun project. You get to write algorithms, optimise performance, and do GPU programming. But who needs another text editor that will probably never reach feature parity with Vim and a terminal multiplexer.
I can't think of a nice way to express what I think of vim, but I think your general point is apt. Some pretty full-featured editors already exist that people are happy with or, perhaps, have at least gotten used to. Where does a new editor fit in? It's neat that it's "multiplayer" but that's an edge case. I'm also not convinced by the business model. Do people really want channels, calls and chat integrated with the…
Chat is similar.