Because ZFS is 100000000000X better than btrfs...<p>the ZFS commands are more logical, and better designed<p>The ZFS FileSystem is truely enterprise ready...  btrfs is atleast 5 years away from being production ready<p>btrfs has all kinds of bugs and issues.<p>zfs did not hold to legacy conventions,  they looked at filesystems in a differnet way.<p>btrfs attempts to hold on the traditional filesystem methodology and shoehorn more modern ideas in to that traditional framework, and IMO it does not work at all<p>the zfs and zpool commands are brilliant, intuitive, and easy to use.<p>The btrfs command structure is complicated, non-intuitive, and antiquated