On the other hand, it will be best case a decade or two before these things are out on the road en masse and even then only the youngest drivers wouldn't have g

On the other hand, it will be best case a decade or two before these things are out on the road en masse and even then only the youngest drivers wouldn't have gained many hours of driving experience. Meanwhile, in that time both automated car and sensor tech will have advanced quite a bit. It's only been a decade since that first DARPA challenge and five years since google started their project, after all.