Just like in the rest of the world, in the US too the vast majority of people are clustered in and around urban areas. In order to achieve your goal/argument you counted vast stretches of nothingness. At least since the early 20th century migration to cities has been going on, and it still does - large urbanized areas continue to suck in people from the already emptier areas of the country.
https://en.wikipedia.org/wiki/Megaregions_of_the_United_Stat...
In what way do you mean? Wind power?
Textiles? Gone
Light industrial? Gone
Regional banks? Dying
Local banks? Dead
Small retail? Dead
Dairy agriculture? Dying
Family agriculture? Dead
I grew up in a small town. 20 operating farms circa 1990. 2 today. 3 agricultural/equipment dealers, today 0. 5 small/medium manufacturers... 1 today, because of a military contract. School enrollment? -25%.
I watched the beginning of decline when I was in high school. There is no anchor businesses that sustain local economies, and no access to capital. Without government spending, either indirect or direct transfer payments, a shockingly high number of US localities would be in a state of complete implosion.
Conglomerates are all about capital, not efficiency. We are paying more, not less, by eliminating market participants.
Visit Germany sometime. Drive through the countryside. Most parts of the US look like a hollowed out shell by comparison.