Who's to say that will be immediate? Many people won't be quick to abandon their guaranteed-available vehicle, especially while every house and employer has parking.

It would have to be the manufacturer.

If someone steals your car and kills someone with it, then disappears without ever being identified, the car owner doesn't assume liability. Liability falls on whoever was operating it at the time. If software was driving, then the software company assumes the liability.

It's not the same. When you have a dog you use a leash and, if needed, you can restrain the mouth.

In this case you are not in control. And you can't be. You are just a passenger. And you should have the same responsibility as a passenger in a train: none.

I guess it would be the car maker's responsibility if you are only a passenger in the car.