Oh god no. I tried that same "realtime collaboration" feature with c9.io, and it quickly becomes a huge PITA when it's time to test your changes. If anyone is writing midsentence, you have to ask everyone to stop writing so you can test out your stuff, or you'll be swimming in syntax errors. It just doesn't work. Unless, of course, those guys here had an epiphany on to how to solve this problem.<p>And of course, there's the obvious huge caveat of having other live cursors dancing around ruining your concentration. I like it when editing documents, but I feel like there's just no point in doing it on a source file.