I think there is a real market for modding news cars to have physical buttons again. Whenever this discussion pops up on the internet, there's plenty if people who prefer them (they're called "old folks" ;-)) so why not mod your dashboard to feature a - wait for it - volume button for your music!
I sure hope so. I can avoid this whole touchscreen madness by only buying older cars, but there's a chance that I'll outlive the availability of cars that are old enough.