This is negative value. The only reason the big companies host their source code on GitHub is because it's independent. They will stop doing that tomorrow if GitHub is acquired and it will lose all its value.
It's just software. My experience with git was about a month long phase where I devoted a few hours a week to learning it. Now I can use it but I still have to google commands for anything other than the basics. That's the problem with git. Git without google would be unusable. That's why I consider it to be extraordinarily poorly designed. You've seen git commands, I'm not going to go look up some esoteric command just to prove a point to you. The point is a good program would not force you to google everything, it would just work.
I consider git to be more of an advertising feat. It fascinates me how many people drank the kool-aid.