I agree that there are many benefits, and reasons to desire building more for those benefits. And costs: I wouldn't want to live in any dense city I've ever vi

I agree that there are many benefits, and reasons to desire building more for those benefits. And costs: I wouldn't want to live in any dense city I've ever visited, and I've seen ones all over the world, but that's my choice-- and I think it's totally reasonable for people to have other preferences. But I think its far less clear that affordability should be expected to be among those benefits. It's hard to be sure how much value causes density vs density causes value, otherwise one would say that as the post shows-- the existing examples show that increasing density will decrease affordability. But many people do accept the argument that more roads mean more traffic.