> but unfortunately many newer, denser, cities can't be easily rezoned/rebuilt into residential/mixed use because the city infrastructure (usually plumbing) can

> but unfortunately many newer, denser, cities can't be easily rezoned/rebuilt into residential/mixed use because the city infrastructure (usually plumbing) can't handle it. It could still house some residential use, albeit very few large units. Wouldn't probably be profitable. What's the alternative? Teardown and rebuild?