[Chromozon]

Many large companies use Perforce. Its UI is great. It's very easy to learn, so the cost of teaching new employees is low. It's hard to screw up, and when you do screw up, it doesn't require an expert to come in and fix things with obscure commands.

[nhaehnle]

I'm genuinely curious if this isn't an effect of biased in favour of what you know (on both sides, possibly). I found Perforce to be terribly opaque. Perhaps this is because the good stuff is buried amidst enterprise nonsense, but compare the experience of going to git-scm.com versus perforce.com if your goal is to learn.

(Not to mention the fact that Perforce as I know it simply doesn't cover the distributed use cases that Git does. Obviously adding distributed features makes any VCS more complex, but that is the inherent complexity of the problem space as opposed to artificial complexity. If your problem is conceptually easier, you can make the solution appear easier.)