There's a great Wendover video one this:
https://www.youtube.com/watch?v=-cjfTG8DbwA
Transportation is the single greatest factor in reducing the number of people in poverty in a city. This isn't just opinion, there are a number of studies that suggest this. American can greatly reduce poverty, pollution and gridlock if we got over our apprehension to rails.
I think we might be in agreeance, and I am all for more rail and public transport. My little prediction was just musing about a possible outcome should we follow the autonomous car route, which I think would be the wrong choice.
I am happy to see that there are some projects working on alternatives (or I guess in some ways, bringing back what used to work).
With extensive rail comes easier cycling infrastructure as well, as it just follows the rail and is separated from the car traffic. It's a much more positive outcome for many reasons.
I guess this is just a step in the evolution of per-individual transport, and eventually we will get rid of roads and automobiles as we know them for self-locomoting ambiguous transport pods that don't need big asphalt/concrete roads.
We waste so much space to roads and bespoke parking lots.