Sure, at first. But then your daughter has the SUV and your husband has the sedan and you want to get groceries and your sons want to go to two different friends houses, so you end up using sepf-driving cars all the time anyway, and you realize it's actually quite nice not to have to worry about maintenance and cleaning and charging. And you realize you could save $300 a month. And oh, you can just order a 4-wheel-drive vehicle pre-loaded with kayaks for your camping trip? And... and... and.

We haven't imagine half of what cars-as-a-service will entail. Some people will always hold onto their vehicles, but in the end I don't think a hunk of plastic and metal will be able to compete with a fleet of special-purpose vehicles supported by a staff of thousands.