Anyway it's probably fine software and I am genuinely going to give it a shot for a usecase I have involving large image files. But the LLM-generated docs don't inspire confidence.
[1] https://epicgames.github.io/lore/explanation/system-design/
[2] They literally have a section header "10.1 Revision state as a 320-byte fragment". The byte size isn't even relevant in the code as an implementation detail, much less belongs in a design doc. No one read this doc before publishing it.
On the flip side, I expect the project itself will be workable - well, assuming they're actually using it themselves! UE is a big pile of Stuff on its own, and Fortnite must have god knows how much additional crap in there, so if this is (or will be) their replacement for Perforce internally, then it'll be getting a good deal of testing. (If they're just chucking it over the wall, though... well, sheesh, you first...)
(Perforce is the standard thing for games, and pretty well it works too, and hopefully this will deliver it a well-needed kick. It was sold to private equity about 10 years ago, and it feels like they've been coasting ever since. (Perhaps users in other sectors are happier though?))