By the way, a major problem that cannot be fixed is transport of basic resources for processing and manufacturing. Localization makes no sense as you have to transport the raw resources to where they're needed anyway and it is almost impossible that you have the necessary materials or parts on hand. Concentration works better as you can use bulk transport, cheaper per unit. But reducing consumption and replacing materials with locally available equivalents is king. In this regard, most plastics can be made locally (or the equivalents) so local assembly would win, but for advanced technologies or metal products there's no way most of the time to replace it. We can use less - plastic cars, earthworks and plastics (esp. biopolymers) rather than glass and concrete for structure as much as possible and more.