> If the thesis is "cars will approach 50% or greater utilization" then car numbers must drop barring a massive increase in road capacity for which the land does not exist.

You can build stacked roads a few levels up. Capacity doubles or triples without any significant land use.

That sounds like an absolute dystopian nightmare. Can we instead just design cities so they don't depend on cars as much?

Visit Amsterdam, then visit LA. Tell me which place is more pleasant to be in.