I don't see the problem. If you're going to own one vehicle, you need to size for peak loads. If you hail a self-driving vehicle, you can size for the trip. I s

I don't see the problem. If you're going to own one vehicle, you need to size for peak loads. If you hail a self-driving vehicle, you can size for the trip. I see no reason to expect the composition of rental fleets to mirror purchased vehicle preferences. Carpooling is not a meaningful comparison. Carpooling requires picking up (and tolerating) other people on a semi-rigid schedule. Hailing a self-driving car has all the benefits of driving solo, plus you don't have to drive.