Anecdotal but btrfs is the only filesystem I've lost data with (and it wasn't in a RAID configuration). That combined with the btrfs tools being the most aggressively bad management utilities out there* ensure that I'm staying with ext4/xfs/zfs for now.
*Coming from the extremely well thought out and documented zfs utilities to btrfs will have you wondering wtf fairly frequently while you learn your way around.
*Coming from the extremely well thought out and documented zfs utilities to btrfs will have you wondering wtf fairly frequently while you learn your way around.