Earlier quoted context omitted.
That would seem to be a very urbanite view of the world. A lot of people have good reasons for owning their own personalized vehicle. (Gear, kids, mobile storage locker, etc.) So long as you live somewhere with enough space that storing a vehicle isn't expensive/difficult, given that most of the costs are in mileage, it's hard to see most people giving up ownership. And, in any case, full door to door autonomy, in at…
Kids is a big thing -- needing specific car seats means taxis are out until your kids are 12. That said the average car costs $34k in the US and lasts say 10 years, that's $3,400 a year. Maintenence, taxes, etc another $1500 at least, that's $5k/yr before you move an inch. While automatic cars may not get rid of everything, many 2 or 3 car families, especially in the suburbs, may drop to 1.
That's why suburbs exist. Financially, it's a much better deal for families on just about any axis.