@fredx181
Just FYI, my encrypted save file changes.dat got corrupted and read-only again. With the btrfs.
I didn't bother with trying to fix it. I just rebooted using a changes directory (I keep two separate entries on my grub menu) then deleted changes.dat and created a new one. And rebooted again.
I'm running on the new changes.dat file. Let's see how long it will last.