And one really great reason not to use it, the license. At any point they can yank it away from you, why invest time into learning something like that?
They have made at least two attempts to do that in the past as well with dropping the cheap versions of visual c# 2003 and then trying to yank the desktop version of visual studio 2013 express so a fair observation.
Plus I think you have to sign in now to maintain your license in community edition and the SDK is no longer standalone.
