OpenZFS is frequently lagging behind in support for newer kernels
which would work against
Fedora's "rolling" approach to kernel releases.
Yes, there is quite
often a time delay between kernel releases and OpenZFS releases that contain compatibility
patches. However, in my experience, the OpenZFS developers are aware of this and act
rather quickly. I believe that if a project like Fedora were to switch to ZFS, this would
not be an issue at all - ZFS compatibility patches are usually available early on during
the kernel development cycle, the delay is mostly due to the lack of testing and review.
Proxmox and Ubuntu don't feature rolling kernel releases.
That's why they can ship
OpenZFS (without legal problems, btw).
Would you care to elaborate why a rolling
release kernel is not hit by any legal problems? I fail to see how that is relevant here,
but then again, I am certainly not a lawyer and my understanding of the legal implications
is rudimentary at best.