[FredPret]

I enjoy both low and high density living.

The argument in favour of density is that if you increase density, then you also decrease the average distance that people have to travel until they get somewhere interesting, like a job or a shop.

Vehicle-delivered utilities like garbage collection, package deliveries, and mass transit get more efficient, and the same goes for tunnel-delivered utilities like fiber internet and water.

San Francisco is economically one of the world's most impactful cities; it'd be good for all of us if there was more of it. You get all sorts of interesting multiplier effects when you put lots of a certain kind of person in one place.

- all the theater kids in one town: LA

- all the bankers: NYC, London

- all the computer people: SF

[adamiscool8]

Granted there are economic efficiencies. But I'm not convinced the fully expanded multipliers from one Super SF with 4X the density - turning it into somewhere like Manila - would be better across all metrics (economic and human) than fostering four easily interconnected mini-SFs.