Corporate IT managers think (rightly or wrongly; probably some of both) that they benefit from fewer browser updates. And to some degree, other folks in corpora

Corporate IT managers think (rightly or wrongly; probably some of both) that they benefit from fewer browser updates. And to some degree, other folks in corporate IT... developers also prefer targeting fewer browser variations, etc. Perhaps they don't prefer it more highly than their preference for being able to write to modern standards, but when you're into user testing and there's two weeks left on your deadline, you hate to have to spend a lot of time dealing with the fact that it turns out that you have more versions of browsers out there than you thought and they don't all deal with your shiny new web app in the same way. It also sucks to have to deal with calls that the z in Firefox x.y.z broke your app that you weren't expecting to spend any money on maintaining this month.