There are things that you would regularly expect to operate while driving that can only be operated by touch screen in a Model S. What things are there? I don'

There are things that you would regularly expect to operate while driving that can only be operated by touch screen in a Model S. What things are there? I don't own a Model S, but am considering buying one, so I'm genuinely curious. I agree that you probably don't want to have to use the touchscreen while you're driving, but I was under the impression that most things could also be controlled via steering wheel buttons, so I assumed this wouldn't be a major issue. Obviously there's some stuff you can't do via steering wheel controls, like web browsing, but then again I wouldn't want to browse the web while driving anyway. I've also been told that web browsing is disabled while the car is moving, but I'm not 100% sure if this is correct or not.