I did my first BTRFS setup over the weekend. I followed the Arch wiki to set up what I thought was RAID 1 only to find out nearly a TB of copying later that it was splitting the data between the drives, not mirroring them (only the metadata was in R1.) One command later and I'd converted the filesystem to true RAID 1. I feel like any other system would require a total redo of the entire FS, but BTRFS did it flawlessly.
I'm still confused, however, as it seems RAID 1 only works with two drives from what I've read. Is that true? Why?
I had a rock solid AMD RX 580 up until the release of kernel version 6.7. Now I'm lucky to get a system that can remain up for longer than thirty minutes. Sticking to 6.6 has worked for me and definitely something you should try as well, but it's worth noting that any amount of time spent on the issue tracker for AMD GPU stuff will reveal tons of issues from 6.6 as well.