Perhaps, but in doing so you trade off many of the benefits of ownership (i.e. personal space). Plus you'd need to time-box the rental to ensure availability wh

Perhaps, but in doing so you trade off many of the benefits of ownership (i.e. personal space). Plus you'd need to time-box the rental to ensure availability when you need it, whereas the taxi user can just decide to go somewhere. (So maybe you choose to use a taxi in those cases...) I think you'd end up blurring the line with taxis so much that the ownership would hardly be worth it.