Also once you have fully autonomous with no human oversight vehicles there is no reason they even have to look like a car internally any more, it could be a sin

Also once you have fully autonomous with no human oversight vehicles there is no reason they even have to look like a car internally any more, it could be a single bed next to a sit up chair and a table, you could sleep properly while you drive along or sit and work, that would sound pretty pleasant, work for a few hours while it drives, pull over for something to eat then get your head down and wake up at your destination.