A friend of mine from Michigan told me recently that so many formerly prosperous towns and districts throughout the state have been absolutely hollowed out by de-industrialization and population decline. At the same time, there has been an explosion in the growth of sprawling subdivisions all over-and not just in the metropolitan areas, but in areas further and further out in the countryside (or what was once the countryside, anyway).
Yes, this is an international trend.
I dislike it intensely (shocking, I know). Of course it isn't just bad for the countryside (however defined), it's also bad for the city.
Yes; you see this everywhere as well. Any service - including churches, voluntary organisations and so on - has a minimum number of participants (or consumers, or customers, or members, or whatever: depends on the type of organisation) that it can't survive falling below. In the area I grew up in there are now too many pubs for the number of potential/actual customers, so they are never all operating at the same time (exactly which are closed tends to change, of course).