I disagree, I feel no matter how good the technology becomes, the odd one-in-a-million glitch that kills someone is not preferable to me over the accidents caused by humans. (Even if we assume the self driving cars crash at a lesser rate than human drivers).
The less augmentation past lane assist and automated braking the better IMO. I definitely disagree with a capped speed limit built into the vehicle, that should never be limited less than what could melt engine components or something (and even that would be take time to turn on). The detriments that system would cause when it malfunctions far outweigh the benefits it would bring to safety.