GEFS on OpenBSD continues to improve
A little while ago, we talked about 9front's Good Enough File System being ported to OpenBSD. A lot of progress has been made on this front lately. Aside from fixing bugs and porting over fixes from the 9front side, there's also been a ton more substantial changes.
Some userspace tools have been done (you can now mkfs on openbsd!), but snapshot control hasn't
https://www.osnews.com/story/146280/gefs-on-openbsd-continues-to-improve/