Flood update: Today I checked on my stuff in storage and was happy to find that there is apparently no damage inside any of my instrument cases; they just got a little bit of dirt on the outside. Yay!
Mac update: Even after having done all the stuff to make it stable, it continues to be unstable. Ugh. So I decided to just go ahead and buy an M1 Mac mini (512GB storage, 16GB RAM), monitor, external NVMe m.2 enclosure, and a 2TB drive for it. I won’t have the new computer until January 15. Normally I wouldn’t be so eager to do a first-gen new-architecture Mac but the reviews of it have been great and meanwhile this 2017 iMac has always given me a lot of trouble with stability and reliability and mysterious problems; Big Sur made it worse, but it was never a particularly great computer to begin with.1