The screen went out in Mom's Caddy last year, and it took something like 45-60 days for the dealer to receive a replacement. So, no heat, no radio controls... no nuthin' for a month or two. To GM's credit, the vehicle was still drivable, just not very pleasanty without climate controls in Florida heat.
Not true. In fact, over recent years I've noticed they're reversing course, and adding back most critical functions that had been previously moved to touch screens. Manufacturers have heard loud and clear, that customers and consumer agencies consider a non-tactile screen to be dangerous, for functions you might need to access while driving. If you look at a 2023 model versus a 2015 model, you'll find that on many vehicles, functions that had been once moved into the screen are now appearing again in buttons and knobs.