Any macOS update is taking a terrible chance of new and unwanted problems, major and minor.
So 24 X 7, my primary display (NEC PA302W) sits there burning 100 watts of power while also burning-out the phosphors in the display. Joy.
I don’t dare shut down the Mac Pro, lest I have a disaster like I did today.
If I turn off the display, my entire desktop is jumbled into a mess onto the other display, and then I also have trouble getting it to come back (fails to sync up and show an image).
It’s not just my system: I have a friend who can only boot his iMac Pro and get the 2nd display to work if he first unplugs that display, boots up, then and only then plugs in the display.
Apple quality control is an oxymoron.