That makes me think, will we have car theft in the future where someone hacks your self driving car and it makes off on itself in the night? The next day you wake up to notice that your car has left you for someone else?
I'd trust google to maintain the security in a fleet of robo taxi's where cars can be brought in, modified or replaced relatively quickly over Tesla trying to convince individual owners to do the same...
People are too attached with property and social status stuff.
Beyond that, it seems like the nature of self driving might be one of gradual incremental improvement, where in order to actually develop it you more or less have to run a fleet of robo taxi's in different places with different climates and different road conditions.
Finally, the people most likely to deliver it are google (waymo) and I think they have zero desire to sell cars to consumers but are literally running a taxi service as we speak.
Repossessing a self driving car, on the other hand...
It would be have it self-drive from the owner's home to someplace nearby not associated with the the thieves to get it out of sight from the owner's security cameras and whatever other security cameras in the neighborhood might be watching where the gang can disable the cloud connection and then transport it by truck or driving it in manual mode to their chop shop.