This would still be mostly a common ride, although the space requirements would be increased significantly. But with the automation and routing systems (and coordination) it would be far superior to cars on roads.

It still sounds like we each have our own individual pod that's less efficient than if we had one common pod that can handle a bunch of people going in a common direction.

Distributed systems that have to coordinate multiple moving parts are more prone to breakage, and single points of failure.

Not to mention the infrastructure that's required to build millions of what it sounds like are indivdiual train cars (albeit, much smaller), and the tracks required to get people to where they're going.

You're reinventing the train, but worse there... (https://www.youtube.com/watch?v=fvvA_GToc0M&ab_channel=AdamS...)

Better would be to make train cars with seats that have better isolation for people traveling in small groups. But honestly, I think we're overestimating the number of people that need this. And there's a small possibly they could still be serviced by a small car in a world where 80% of people are able to use other services.