IMHO, the big difference between the Uber/Tesla approach and the Waymo approach is that Waymo seems to understand that this is an extremely hard problem to solv

IMHO, the big difference between the Uber/Tesla approach and the Waymo approach is that Waymo seems to understand that this is an extremely hard problem to solve. Uber/Tesla seem to be happy with getting 90% of the way there and make headlines. I don't think either Uber or Tesla have really committed to the technology the way Waymo has. As far as the legacy auto-makers, it's really unclear what they are up to. I think they appreciate the difficulty, but probably don't have the skills to move faster than Google.