I've spent the last couple of days looking at conda, a Python environment manager built by Continuum. In their own words, conda is "git branching for site-packages, combined with yum for Python packages." As I understand the project, it's actually quite a bit more than that.
I love git. Seriously, it's changed my life - before I used git, I was using Microsoft's Visual SourceSafe. Those were dark days indeed.
Git is probably the most well-though-out and consistent tool I've ever used. Innumerable developers around the world use it, from Linus hacking on the Linux kernel to a guy on Github submitting his first pull request. It's mature.
When you reach so close to perfection, the smallest issue seems much larger than it is. I think that's why this bothers me.