You're going to pay for all those things even if it's indirectly through someone else who owns the vehicle. Most vehicle costs are related to mileage, not time--especially outside of areas where rust is a major factor.

I'm sure there will be a difference at the margins in cities where many people don't need a car on a daily basis. I assume that's already the case with Uber/Lyft today. And self-driving when it eventually arrives in those areas presumably will decrease costs some. But for someone who lives outside of dense city centers it seems likely they'll continue to want to own a car that is a model they like, equipped to their specifications, and storing all the various things they keep in a car.