I just really cannot ever see mass use of azure and visual studio in the web ecosystem. The people writing nodejs code are all using vim and unix, and you're asking them to give up their workflow and change operating systems. I want to be able to poke around in bash. (edited back in)
Sure, some people new to web programming might go this route. But the next big web framework certainly will be on unix first. MS is now in this perpetual state of trying to keep up, and I just can't imagine why anyone serious about web programming wouldn't be on *nix.