I was in SF a few weekend ago and rode both Waymo and normal Lyft style taxi cars. the Waymo was a better experience in every single way. One of the Lyfts i was in drove on the shoulder for a while like it was a lane. The Waymos were just smooth consistent driving. No aggressive driving to get you dumped off so they can get to the next fair.
Waymo cars are also more likely to be properly maintained. I've noticed that a lot of Uber / Lyft cars have some kind of warning light on the dashboard: check engine, low tire pressure, overdue for service.
Waymo cars are new. Wait until their fleets are 10+ years old. They'll have all the same bad maintenance issues that airplanes, semis, rental cars, and any other company-owned vehicles have.
Really? I fly a lot and Part 121 commercial airliners seem to be pretty well maintained.
Very few airliners depart in perfect working order. There is a "MEL" (minimum equipment list) that details which systems can be inop and still operate the flight.