I started using it on my NAS and also on root. Then I switched my personal machine to ZFS on root. I manually created both setups (somehow). This is the worst part in my opinion. The best decision, though, was to ditch grub in favor of zfsbootmenu. Skips all the brittle steps with grub and its boot partition. Now I just have zfsbootmenu directly loaded by UEFI from the EFI partition. Everything important is directly on ZFS, including… well, everything. Can also use snapshots but I have not needed that yet.