Hi.. I'm currently back on macOS but ran Ubuntu 20.04 on my iMac for ~4 months exclusively. As in no macOS install at all. Purely Ubuntu. At least once a month, my boot disk would revert to read only.

Are you a dual-booter running a Linux-Windows or even a Linux-Linux dual-boot system? Have you ever lost booting access to one of your OSes or want to be prepared for if and when that happens? If yes, ...