you're just describing another thing that can go wrong. Most likely when you "rip open the dashboard" there's a few different PCBs that can all go bad, then a bunch of fuses, small LEDs, other things that need to be fixed. People act like anyone with a touchscreen hasn't had a car before that had all those things. I replaced sensors, wires, and my oil temp gauge still didn't work. Two LEDs on the display had some kind of bad voltage or something because I had to replace them every few years. It's so cool having spare fuses and being able to identify the blown one and replace it until you get a touchscreen and you never have to.

A lot of people have their self-worth tied up in being the guy that can fix things, so it hurts when you just no longer have to.

Or you reach for a certain area of the screen out of muscle memory, but the UI changed "just because" and now you're very distracted.

> wait until the whole thing is unresponsive due to heat or a bug

Chances are if the whole thing is unresponsive due to heat or a bug the volume knob isn't going to actually change the volume as well. Its not like the knob is the actual pot directly changing the circuitry in the amp these days, its a digital input.