Well, I finally did this update myself last night. I don’t recommend doing it, and hold off as long as you can on the OTA. Two time in each of two drives, the music turned into a buzzing sound, and the radio automatically rebooted. Obviously, my map route was killed once it turned back on.
Also, I have the display light/dark mode to switch automatically with headlights. My Home Screen is CarPlay up top and factory nav on bottom. At night with the headlights on, the nav at the bottom will correctly be in dark mode, but CarPlay on top will sometimes be in dark mode, sometimes in light mode.