yes don't need to touch most of controls once underway.Things like volume are very frequently on the steering wheel now, climate control is a set and forget system anyway, demister is a 'before you drive off' function, sat nav shouldn't be getting adjusted on the move beyond a typical 'accept alternative route' prompt etc. etc
Sat Nav is the most frequent interaction I need if I am driving somewhere urban unfamiliar, where I find google maps can propose some stupid routes,
so I need to be able to get an overview map/zoom-out ... to see what it's up to. - a screen with more real estate could help significantly though (so maybe tesla/merc/explorer nailed that)
[google have a lot of sins to answer for]