Re: Touch screens
I follow what you mean, and agree for primary, secondary and to some extent tertiary controls.
In our current car (Accord 2005), there is a touch screen for controlling navigation (hard to avoid), and finer adjustment of sound and aircon/ventilation. Mostly those are not needed, I just put the aircon on auto and adjust temperature.
Everything else is unimaginatively placed like in most cars at the time - wonderful!
OT: Why do cars need electric parking brakes?