To be CRYSTAL clear... I was not complaining about the fact that the rollback didn't work. And yes, I was "paying attention." But, thanks for the oh-so helpful message, @jnealand. What i was complaining about is that I had a perfectly working setup at Christmas, upgraded (following all instructions), and it hosed my entire layout / settings.
To the rest of you... Thanks for trying to help. I was spending far more time trying to identify what happened than it would've taken to just re-do the entire setup. So, that's what I did.
For anyone else who has this happen... the GOOD news is that it takes 1/2 the time to set everything up compared to what it used to. Or, at least that was my experience.
Only issue that remains is that xSchedule is preventing my monitors from turning off in 2020.12 (i'm just talking about monitor power, not "sleep"). That didn't happen in my prior version either. Is that being addressed?
Thanks all!