The reality is that many are not interested in waiting and adopt ZFS permanently. This was my experience ~6 years ago. Had btrfs worked better then, I would pro

The reality is that many are not interested in waiting and adopt ZFS permanently. This was my experience ~6 years ago. Had btrfs worked better then, I would probably have been a btrfs contributor today. Of what I know now about the internals of each, I am glad that I went with ZFS. The decisions in ZFS are more robust in terms of reliability and performance. e.g. The merkle tree, the use of 256-but checksums, mandatory ditto blocks, the ARC algorithm, the intent log, default ditto blocks, an variable height, indirect block tree, etcetera.