Woah woah woah don't let me dissuade you from NixOS. I am still a happy NixOS+ZFS user, and my fingers are crossed that I'll soon get to upgrade to kernel 6.12 :)
No worries on that front, I expect that fun fact to be just a minor setback but I'm still pretty dead set on making my personal infrastructure declarative, reproducible, and anti-hysteresis.
Honestly I wouldn't even try running ZFS on anything else but a distro that ship it like ubuntu or its variant or a distro with long term support like almalinux 9.