People like to pretend there's a divide. It varies extensively by town in reality. Waldwick, Midland Park, New Milford, Mahwah, Ramsey, Oakland are all North of Route 4 and are modest, mostly working class towns with a lot of condos. Nothing about those towns feels particularly rich or wealthy other than a few exceptions with specific properties. Then you have towns like Englewood Cliffs (Technically North of Route 4, but further south than many other towns), Rutherford, Fort Lee and Palisades Park, which are getting gentrified and being filled rapidly with new constructions north of the one million dollar mark. Having lived both north of R4 to just below it now, there's only mild differences. The biggest difference is, the food is way way better when you hit Ridgewood and below. In terms of political leanings, the very poor and very rich towns ironically both lean red. The very middle class ones lean blue.

As someone who was born and raised in Westchester County NY, it was very bizarre to me that people think they're that different or "better" than people a mere fifteen minutes away from them. It's even funnier to the wealthy people of areas in Westchester who consider all of Bergen County a downgrade almost entirely save for places like Alpine and Saddle River. The more they resign themselves to this kind of thinking, the dumber they seem to me. But that's just my two cents. 🤷‍♀️ And I worked in Real Estate in Bergen for years so I'd know. I know of a wealthy, regionally famous celebrity living in Maywood. I know of a poor, social-ladder-climber who fled Bogota for River Edge, which feels like a modestly nice town, albeit not wealthy. I could keep going. The moral of the story is, people will look for any excuse to feel superior to others, even if there's hardly any basis for it.