Earlier quoted context omitted.
> But life is full of safety vs. living tradeoffs. That's not even the issue. Suppose that more people wanted to live in a city than currently do. The market implies that -- the price per square foot is higher in cities. And that's the problem, when the city isn't allowed to grow. The existing city already has tall buildings, so if there is more demand than supply, to create more of it you need to add more somewhere…
In the extremes I fear this would lead to Dredd-like Mega Cities just taking over the entire continent. At some point, a lot of people want a multi-generational space to stick around in for a long time (where the sun isn't blotted by tall buildings). Tearing up suburbs for skyscrapers every generation can't possibly be "the answer..."
Infinite cities only yh happen with infinite population.