I tried ZFS-on-linux with Ubuntu 21.10 and it ate my data (ZFS panics when accessing certain files). Sure, Ubuntu does have a habit of using unstable kernels, but I was still disappointed. It should be stable at this point.

That corruption was caused by a patch that Ubuntu created themselves, it was never in upstream. ZFS on any other platform would be OK.

https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/190...

I've never tried Ubuntu, but zfs has been rock solid on Fedora, Arch and Debian for me. Whatever the issue that hit you was, I hope recent versions of Ubuntu/zfs have fixed it.