Zfs is the sole spread and battle tested moderately modern storage we have in the world, the other but constrained by the OS it support is Hammer. btrfs, lvm, mdraid, luks, stratis are monsters designed by people who do not really understand operation.
Actually they are one of the reasons why GNU/Linux is in a so dire state respect of decade old unices.
LUKS is okay in compariton to GELI. btrfs doesn't have RAID10. btrfs RAID10 is actually RAID1 with some performance optimizations. zfs makes lvm obsolete. mdraid is inferior to zfs.
I wouldn't say they are monsters. But, they are just not good enough.
Because zfs native encryption is still immature for send/receive, there's still some value in LUKS, and zfs native encryption doesn't yet support multiple key slots because it is essentially unmaintained.
