Every so often someone will do a "what editor do you use?" poll here, vim is the top choice. Maybe it's not the most common in the industry, especially if you include the hordes of Java or C# only developers, but at least among HN devs it's the #1 pick.
A stack overflow survey (http://stackoverflow.com/research/developer-survey-2016) had plenty of vim users and that includes us c#/java hordes.
I spent quite a lot of time mastering vim. It's beautiful editor and I could be incredibly productive with it, but I'm not sure that there are many people who'll do that.