[Yuri]

Zooming out, taking the entire American continent, I see Mexico City and São Paulo increasing their lead over New York as both are still growing to nearly double-digit rates and are surrounded by very populated and fast growing areas.

Down the list, as Los Angeles slows, Buenos Aires might reverse the takeover, that happened somewhere in the late 1950's. Argentina has a very health TFR, kept slightly above 2.0 for the past 5 decades. Buenos Aires-La Plata reached 16 million people in 2019, growing at 11%/decade. That's enough to cut the distance to Los Angeles by 700,000 people every decade.

I guess those 5 will be the only cities in Americas that will be over 20 million people in our lifetimes.