@Natanox
I'm not saying BTRFS fails technically. It seems to work, in fact.

But you need to have a deep, low-level understanding of it in order to use it successfully, and much of your standard Unix/Linux lore doesn't apply (e.g. totally different system from "fsck").

As I am not a filesystem expert, I decided to go back to a more-familiar system, where it was much easier to figure out what was going on if something broke, even if it's probably not as technically sophisticated.