I think there are probably serious limits on the extent to which decentralization is viable in North America. The lifestyle that comes with rural life for example is not one that the majority of the population finds attractive, with how far removed from not only creature comforts but also employment opportunities and essential services it makes one.
There's also many things that don't work out economically for towns below a certain size. This is why little towns of 1k-10k tend to have only megacorp chain shops and restaurants — despite the cost of operations being so much cheaper than they are in more urban areas, things like little family owned bakeries, delis, etc are mostly found in cities in the US.
The latter of those paragraphs could perhaps be changed, but it'd take an earth-shattering level of infrastructural redevelopment that I don't see happening any time soon.
There's also many things that don't work out economically for towns below a certain size. This is why little towns of 1k-10k tend to have only megacorp chain shops and restaurants — despite the cost of operations being so much cheaper than they are in more urban areas, things like little family owned bakeries, delis, etc are mostly found in cities in the US.
The latter of those paragraphs could perhaps be changed, but it'd take an earth-shattering level of infrastructural redevelopment that I don't see happening any time soon.