I mean, for sure there are some cool moonshot ideas. However I think it's pretty important to have some proof of concept or even a technical idea of how that would work before dismissing all of the concerns around congestion. Waving around "tech will save us" is really easy to do. (Especially when the solution to congestion already exists and is criminally underfunded.)

You're right that I did predicate that little rant on the idea that the majority of AVs would be personally owned and not part of a fleet. I'm sure that car share will come into play to some degree, but I do think it's tough to convince people who are used to their car being a personal, (relatively) private space that they can store nearly for free on public roads, to give that up. It's especially hard to convince the automobile industry that the incredibly profitable 1-2 car per household model should be pushed aside in order to manufacture fewer, shared vehicles. Cruise (i.e. GM) will not cannibalize their personal car sale business: they're using this as a way to get test data to build personal AVs. Maybe car share will increase over time, but we're not about to witness some revolution, especially if it reduces consumption or profit.