What if the two blend together where it is difficult to separate them?
Where I live at, 50 years ago was a tiny community without much economic pull. The entire county had a population of around 40K.
And then the big change happened [read: big, big headquarters - Walmart, JB Hunt, Tyson Foods, Daisy, Car-Mart] where we have been going through 40% growth every decade since. The result is we now have a population around 300K but with the money of a much larger city.
Small town feel, big city money.
High education, low poverty, high employment, low crime. Heck, I can leave my front door unlocked [often do - but big dog inside], know all of my neighbors, will have them all together at neighborhood parties with hundreds of people of all backgrounds.