That’s probably up for debate. Buttons break, buttons need backer boards, buttons need complex trim, buttons need lights, buttons need surfaces, buttons wear, etc, etc.
Federal regulations require a backup camera, so you already need the screen. Screens are reliable, static, and easy to install.
my comment was not meant to be absolutist - what I'm looking for is just a very reduced and usable simple car - I don't mind a non-offensive screen if it's required and where it's useful and well made a touch interface might also be useful - but I don't need 99% of the digital things that are packed in a car - I'm not familiar with the building or cost setup of modern EVs but I could imagine that reducting in sensors and cabling might have an effect. Then give me that backup camera, some minimal android auto interface or whatever there is - I can't imagine there isn't a market for that.
Federal regulations require a backup camera, so you already need the screen. Screens are reliable, static, and easy to install.