In my opinion, RSE is already obsolete. Even in the '21s it wasn't compatible with Apple Airplay. From my understanding the '22 doesn't have any wireless video option. My biggest beef with the RSE system is the integration. If GM's master plan is to have supply a dumb screen that requires an HDMI input for everything, why on earth did they put the inputs where they are most likely to be stepped on and broken? Why not bury them INSIDE on the center console where they could be protected? Or at minimum put an A/V cubby that can be accessed from the rear of the console and closed off behind a panel. It would need to be big enough to house some streaming sticks and their power supplies.
That said, I talked to Laura GMC yesterday asking when I could get an ultimate on order and was told to try again in a few months. He made it sound like nearly everything was on constraint. Adaptive Cruise control, air ride suspension, max trailering, power running boards, etc.