Forget parking, the cars would be driving, ferrying people and goods around, as much as possible when not charging. No need to own one, just hail one when you need a ride.
live in the gonnies? own a car. hailing one would take forever. having cars near you in the gonnies,that you dont own wouldn't be economical.
basically, there would be less vehicule owners but not that many less.
For example, friends of mine recently bought a summer cottage. It's a little over an hour's drive. They don't have a car, so they currently rent one or try to borrow one when they want to go there. Once there, the car will probably sit still for a week.
Currently, there's no really good solution to this. Renting is expensive if you just need to drive a couple of hours a week. Buying a car might make more economic sense in the long term, but it's still pretty expensive for the purpose. Taxi rides like that cost an arm and a leg too. But if the car could drive itself out of the woods...
Of course it's a question of pricing, and I'm guessing we're still some way off from having self-driving cars navigate dirt paths that pass through people's yards as is the case here.