In truth there are only 3 self driving products that I know of available today. Tesla's Autopilot, GM's Supercruise (only on CT6), and commma.ai's openpilot.
Of those Autopilot is easily the best.
I never know why a source would matter in these cases as the writers of these sources usually have no idea and the answer isn't clear anyways. But if you want you can use me as a source because I'm an engineer who worked in automotive and has driven all 3 of aforementiond products. I also am not sure Waymo will ever release a feasible product other than their LIDAR.