Do you happen to know if this goes beyond what Btrfs(/Bcachefs) provides on the Linux side of things?
I think someday Btrfs or BCacheFS might have as many features as ZFS, but for now ZFS is still state-of-the-art, as far as I know. RAID-Z is one ZFS feature I use that is not fully implemented in Btrfs yet. All other ZFS features that I use are also available with Btrfs.
😅, but QubesOS isn’t a derivative of OpenBSD either. It might have inspired some of its parts, but fundamentally it’s a completely different beast.
Oops, I am really getting confused with all the different distros! Sorry!