Detroit was the center of manufacturing for "the hegemony," which is currently in the process of losing its control of the financial markets, just like they did in manufacturing.
Unlike Detroit, NYC has a very diversified economy. In addition to being the primary finance capital it is a major international player in media, art, fashion, tech, and more. NYC is simply not utterly dependent on finance in the way Detroit was on manufacturing- or SF is on tech, for a modern example.
I think that’s what has made it, and the other global cities like it, so extremely resilient over a long period of time. That and financial services being, thus far, an evergreen industry.
Finance is pretty meta itself, which is probably a contributing factor to NYC having such a diversified economy. Like an automotive company might still want a business-focused office in NYC, but a non-automotive company doesn't have much reason to open an office in the auto manufacturing capital.
I think that’s what has made it, and the other global cities like it, so extremely resilient over a long period of time. That and financial services being, thus far, an evergreen industry.