>>1980242Former Jew Yorker here.
New York is and has always been a madhouse in some form or fashion. It is a huge and dense city so you will more or less always have a half-decent chance of running into weird shit, schizos, etc. at some point or another. This train roof sex thing is pretty high on the list of weird shit and not something most New Yorkers would be accustomed to but a lot of people would also not think of this as so outrageous it's impossible. "Only in New York".
When I was about to leave the city the city was grappling with a major homelessness problem (still is) but my home neighborhood was gentrifying and more wealthy white people and new development was rolling in slowly but surely. New York is a city of many aspects. I miss its museums but I'm damn glad I don't live there.