ZFS differs from ext3/4 in the sense that ZFS correspond roughly to ext3/4 + lvm + luks + snapper. This is because ZFS is a volume-managing filesystem. IMHO t

ZFS differs from ext3/4 in the sense that ZFS correspond roughly to ext3/4 + lvm + luks + snapper. This is because ZFS is a volume-managing filesystem. IMHO the best feature is snapshotting: you can take a snapshot of a filesystem, change anything and then decide if you want to go back or continue. This is invaluable for backup: you can take a snapshot, perform an update (change kernel, update some service, alter a database table or whatever) and then try and validate the update. If anything goes wrong you can restore the whole state of the filesystem to the snapshot time. This has saved me when a nextcloud update went wrong and basically trashed my installation. No worries: I shut down everything, unmounted the filesystem ("dataset", in zfs parlance) and roll-back the filesystem.