Touchscreens in cars are a terrible idea in general. You have to look at a touchscreen to use it (which means taking your eyes off the road), while buttons and switches can be operated by touch.
Unfortunately, they’re the new fashionable thing and everyone is putting them in their cars. At least some manufacturers are restricting them to things you can wait for a safe moment to adjust (like the radio), but others are having touchscreens to control things you may have to adjust while driving (like defrosters).
