I worked on source control at Facebook/Meta for many years. On top of what aseipp said, I remember the early conversations we had with Microsoft where the perfo

I worked on source control at Facebook/Meta for many years. On top of what aseipp said, I remember the early conversations we had with Microsoft where the performance targets for status/commit/rebase they wanted to hit were an order of magnitude behind where we wanted to be. But most repositories are not that big so this is hardly an issue for most people. Personally, the system I'm most optimistic about in 2024 is Jujutsu. I've been using it full time with Git repos for several months and it's overall been a delight.