Bob, as far as your original concern, I would assume you can ignore the nag to upgrade for several months. I don't think you'll be forced to upgrade for some time.
Thanks, that's good to know.
The nag seems to come twice a week now, but easy to dismiss.
The computer is a ThinkPad T15, and it's almost a year old. I suspect it has the requirements.
When I do the upgrade, I'll make a disk image first, so if it causes trouble, I'll be able to get back, get back, get back to where I once belonged.
Notes ♫