If you don't trust btrfs raid it's perfectly possible to run btrfs on top of lvm or mdadm raid. Then you have btrfs in a prety happy case single device mode. Al

If you don't trust btrfs raid it's perfectly possible to run btrfs on top of lvm or mdadm raid. Then you have btrfs in a prety happy case single device mode. Also the recovery tooling is more well known and tested