It's really a shame. Much like VW from the 90's when my generation was buying their first cars and got burned, either by the car (looking at you Jetta) or the shady af dealerships, a whole swath of us have forever swore off VW/Audi. My wife wouldn't even consider the Q7. GMC has just firmly entered the same category with their inability to manage expectations/supply chain.
It'll be interesting in 5-7 years when these cars are hitting the market, and you have to see what sort of COVID spec it ended up being. Oh, that one never got the ventilated seat blower, or the heated wheel, or wireless charging. Maybe the parking sensors weren't installed, or the heated steering wheel. Ah yeah, that one didn't get the rear camera mirror. But they're competing with vehicles a couple years older that are better equipped.
Best of luck to you all.