>Many, many people will switch, because the cost difference is absurd. The cost per mile for a personal EV is $0.75/mi. The cost per mile for a shared AV EV (at scale) is $0.40/mi. People will save hundreds of dollars per months by not owning a car.

What's the cost per mile at scale for a train?

The NYC subway has an average operting cost of $1.09 per passenger mile.

Also, trains are not directly comparable because self-driving vehicles are point-to-point, while trains are hub-to-hub.