Cities are an outdated idea. They need to be broken up.
Cities fail on multiple levels and the gap only gets wider. They haven't kept up with infrastructure changes for over a century. Cities fail at integrating even older technologies such as passenger and freight rail, automobiles, and aviation.
-Seaports are too small for the previous generation of ships, much less the current one
-Airports are too small for their locations
-Street and highway lanes are too narrow
-Street and highway distances are too tight for safe visibility as well as vehicle turns
-Bridges are too low
-Tunnel lane heights and widths are substandard
-There isn't room for enough roadway lanes to handle the traffic volume
-Sidewalks are too narrow
-Vertical buildings are too restrictive for modern business and industry processes (have always been that way)
Many of these older cities were built up near waterways and are now limited by them.