Re: I'm not so pessimistic
So do trains first.
" I reckon once autonomous cars are shown to be substantially safer than a human driver"
I'd say "IF" rather than "once"
I've been programming since before PCs and I'm sceptical that they will ever be robust. They rely too much on Lidar (easily jammed) and databases as well as human programming.
Also how will the safety testing be achieved?