It felt like the wild west for a while because there were so many open problems and each implementation seemed to be focusing on a subset of them. Git handles all of them with decent enough speed that there isn't much incentive to go against the grain.
I think Git is good enough and so ubiquitous that we won't see a competitor until coding itself drastically changes shape. Who knows what that will look like, but if it's not collections of relatively flat files then Git may someday be replaced.