Besides the suburbs being an unsustainable pyramid scheme, you mean? We're already seeing the start of cities going bankrupt or into heavy debt because all of

Besides the suburbs being an unsustainable pyramid scheme, you mean? We're already seeing the start of cities going bankrupt or into heavy debt because all of the sewers and infrastructure they built 30-60 years ago need replacements that taxes can't possibly cover - and that's before you consider how subsidized the suburbs are with roads, cheap gas, and so on.