Nitpick: the device mapper zoned-device support isn't built on top of the device mapper encrypted-device support; both dm-crypt and dm-zoned are independent dev

Nitpick: the device mapper zoned-device support isn't built on top of the device mapper encrypted-device support; both dm-crypt and dm-zoned are independent device mapper targets. This is native support for btrfs-on-SMR, without the dm-zoned layer in between. DM-zoned is meant for filesystems who are zone-unaware, and it works by batching writes and redirecting blocks into appropriate areas. Having the filesystem allocator be aware of the underlying device's zones allows for more efficient/performant use of the zones.