I have time this week. I just finished making a bootable backup of my Mini using SuperDuper. I already have a USB Flash drive with Catalina, made with DiskMaker. I guess I'm torn (as usual) between just letting the OS do the Update using the Update button in System Preferences, or doing a clean Install of Catalina using the thumb drive.
Clean Install: I like the idea of starting fresh and clean and it being like getting a new Mac, but I don't necessarily like the idea of setting everything up (like preferences and saved passwords and logins) from scratch. I'd also take the opportunity to only install 64 bit versions of apps I'll actually use regularly.
Software Update: Sure would be easier. But then I'd have to go through all my apps and delete the older 32 bit versions. Not a huge deal, but in the olden days, I could run something like Disk Optimizer aftterward to defragment the drive and recoup some of the wiped off space. Or is that not even a thing any more?
Anything else I should consider that I'm not thinking of? As much as I was planning on doing a Clean Install, now I'm leaning toward the easier Software Update. I'm still keeping an eye out for a 16/512 M2 Mini, so whatever I end up doing with this one could be somewhat temporary, depending on how soon one becomes available.
Thanks for your thoughts.