I don't see how people could be tricked to buy a google car with the expectation of the controlling software being obsolete in a couple year and left unupdated

I don't see how people could be tricked to buy a google car with the expectation of the controlling software being obsolete in a couple year and left unupdated as the sensor technology improves. That alone makes google a risky partner for any serious automaker - they're better of as a partner to a leasing agency than a seller.