The on-disk format is the least of the problems with Btrfs. The quality of the implementation of the filesystem which uses that format is the bigger issue. It

The on-disk format is the least of the problems with Btrfs. The quality of the implementation of the filesystem which uses that format is the bigger issue. It's still awful, and I've been using it since the start. Two years ago, I migrated everything to ZFS and haven't looked back. It works. It hasn't lost any data, and it's easy to set up and administer. I can't give it any higher praise than that. It does its stuff with no fuss or drama.