> in the past for ext4 over lvm

I used to look after storage arrays for VFX places.

everytime I saw lvm I inwardly sighed. The docs were terrible, almost as bad as MDADM. snapshots were for a long time unrecoverable. You'd then have to work out what pattern of LV you had, was it a suprise raid0? or a misaligned raid1?

zfs is a night and day compared to LVM/mdadm, two tools, rich help, the man pages are reasonably good, and once you understand zfs vs zpool, you're usually good to go.