I agree, a modern FS is the biggest oversight in OpenBSD for me.
I can overlook a lot of things, but filesystem corruption isn't one of them.
I've run Linux on various filesystems for significantly longer and have never seen filesystem corruption - (excluding me not reading btrfs documentation right).
Here’s to hoping we get a modern FS soon!
My concern though is this line from the readme
> "This repository will be abandoned once Linux or FreeBSD is stabilized with write support. OpenBSD is not the main area of interest."