Personally, any % above "average human driving skill" reliably should start to see more uptake of this new technology. Driverless cars have and will kill people. Sometimes it will be due to programming errors. But on the whole, they are, in many cases, on par or better than human drivers. I think it's good to be cautious, for the industry to be cautious. But I don't want to see people freaking out over a single accident because it involved an AI when there are thousands of non-AI accidents every day. Be consistent in judging them, not against some mythical 100% success rate but against the criteria, is it better/safer than most drivers.