Btrfs brings IMO too little to the table, considering that ZoL is quite mature; It always seemed to me like it's the "we can't have ZFS so..." solution, but unlike Gnome (being the "can't have KDE" solution), it does not yet deliver, after a long long time.
The next fs to make a difference, post ZFS, is likely HAMMER2[0] - it's supposedly already stable for single node use (the ZFS / XFS / ext4 use case), and is advancing towards the multinode-at-the-underlying-fs-level, a first.
The next fs to make a difference, post ZFS, is likely HAMMER2[0] - it's supposedly already stable for single node use (the ZFS / XFS / ext4 use case), and is advancing towards the multinode-at-the-underlying-fs-level, a first.
[0] https://gitweb.dragonflybsd.org/dragonfly.git/blob_plain/HEA...