rhetorically i agree but in material terms suburbs have a lot in place that could be turned over to communities that support and supply urban areas, just reverse the flows of resources & power. we wouldn't need all the people that'd work on new farms, upkeep renewable energy fields, recycle suburban waste to commute from the glorious new commie-blocs when they could be put up in surpluses of housing we'd only need to not tear down (well, maybe modify into more efficient multifamily buildings, but it'll still be cheaper than brand-new)