Never? I disagree. At some point, autonomous driving will be very safe. At one time, every step of manufacturing was done by people. Now a good chunk of it is automated. Yes that's a controlled environment, but I suspect that eventually autonomous cars will either talk to each other and/or will communicate with a centralized system that helps guide them. I suspect we'll have viable autonomous cars before I die, but I don't know if they'll be here before 2030. My guess is they'll take a huge step forward when most (all) cars are autonomous. What I'm not sure is if they'll be able to drive in all situations. My guess is no and thus we'll still have a steering wheel.