We’re starting to use Drive a bit more for remote collaboration because it is the only realtime collaboration space for the most part. It still sits outside our shared file structure and I don’t trust Google enough to shift all our documents there. Also, Drive doesn’t support either Markdown or conventional Word-style document structures and even if we use Drive for Markdown, it is more of a hassle to get that out of there into an app that will do something useful with the Markdown.