FTFY. Git is likely the system used by almost every non game pro shop out there. Paranoid ones self-host.
Linus changed the world twice, and Git may have more impact, overall, than Linux (arguably).
Not bad, for a 10-day yak-shave project.
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.
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.