Your comment as well as @stupid_asshole69@hexbear.net were really food for thought for me. stupid_asshole69 advising against, and yours as a cautionary tale.
This would be a complex stack to accomplish my goal. It occurs to me that it’d be mdadm (raid 1) > LUKS > btrfs since btrfs can’t do encryption which is right in the middle of that stack, so I couldn’t use it’s raid 1 functionality. If any of those pieces break, all the protection they would have otherwise provided me goes out the window.
And I’m not really worried about losing data. I already backup my personal files and most of my configs. The appeal with this kind of setup is the data redundancy and fairly quick recovery. But a partition clone like what saved you also works pretty well for that purpose. I don’t know what I’ll do just yet, but definitely taking all that in to consideration.
Fine points. And I am considering that simplicity might be worth it. Except for:
Totally solid advice, but I love my rolling release distro though. So for the time being I’m willing to accept the associated risk.