Which would have failed had it been developed by someone else, without being a requirement for Linux kernel development.
git growth was very symbiotic with GitHub growth. I don't remember why GitHub became popular in the first place. I think it was the Ruby community? GitHub was one of their own during an explosion of Ruby on Rails and successful startups using it.
The thing about an SCM, though, is that it needs to be rock-solid reliable and trustworthy. No "YOLO, Bro!" or "Move Fast and Break Things."
Git is that. I believe that this is exactly because of who wrote it.
Torvalds has plenty of detractors (and they aren't necessarily wrong), but he is one hell of a C programmer.
I'd trust stuff he wrote, over about 95% of what modern devs, do, these days.
That kind of thing has happened before. When HP adopted IEE-488, it became the standard test equipment interface for a couple of decades.
USBC has arrived.