> Once there are robot cars there is no longer a limit to how many cars can be on the road But there are resource costs. Also your reductio ad absurdum doesn'

> Once there are robot cars there is no longer a limit to how many cars can be on the road But there are resource costs. Also your reductio ad absurdum doesn't make sense. No one is saying there should only be one car that everyone shares. However it's reasonable to say the optimal number of cars (where I might define optimal as "One is always available to you in a short amount of time") is somewhere less than the number of people.