That's all true for me, too, although I hadn't used p4. I resisted Git for a little while because I didn't see the massive appeal of a distributed system in an office with a central server. CVS... worked. SVN was a much more pleasant "faster horse". And then I made myself try Git for a week to see the fuss was all about and my eyes were opened.
Git is not perfect. There are other products that did/do some things better, or at least more conveniently. But Git was miles ahead of anything else at the time that I could use for free, and after I tasted it, I never wanted to go back to anything else.
I was a late adopter, also, and git is definitely not perfect. Mercurial did some things better, and at the time, notably, the forest extension. Git's flexibility is a two edged sword and the history rewrite footguns should be harder to use. Git does comes close enough to solving a fundamental problem it will be very, very durable, though. As long as it is used for linux kernel development I expect it continue to be the dominant dvcs.
Git is not perfect. There are other products that did/do some things better, or at least more conveniently. But Git was miles ahead of anything else at the time that I could use for free, and after I tasted it, I never wanted to go back to anything else.