The first time that this happened i spend a good chunk of time to learn how to fix the problem without reinstalling, the secound time i just moced everything to another driver, reinstalled and moved everything back, it took a feel hours but most of the time i was just waiting for the files to move, so i was able to do something else instead, i don't use brtfs because it corrupted mi ssd once (i have no idea why), but i'm fine on mint, now i don't have much time at home, and when i do i need to be sure that nothing will broke because i have a lot of work to do from my job and college, i really like arch but i really need something stable right now

Except if you upgrade ZFS pools to a newer version that's not yet supported by Grub.