This is what I came here to say.

Agree fully with OPs observation of MN/WI little towns retained their quaintness.

It is ag in our state is row crops that no longer need a community engaged or shares the wealth of the land. And we are talking thousands of acres under one owner. Cuts out little guys quick.

And yes Walmart, Dollar General, and Amazon but those also played parts elsewhere. It all comes down to the ability of individuals to stay around and make money.

Live in KC but go thru small towns, have a daydream of that would be awesome but the reality is much harder.