Interesting points here. I hope things don't work out this way, but I think there is a very strong chance that this is exactly what will happen: the streets of Manhattan below 60th will stay mostly-as-busy, but with more ride shares and private car services, since clear streets means rich people can finally transmute money into quick, private transportation.

I'm curious about this statement:

There exist way more people in New York who would drive if they could, but they literally can’t fit.

I believe there are a lot of rich folks in NYC who would rideshare even more if they didn't get stuck in gridlock. But I'm not sure we have sufficient evidence to say that "way more people" would drive if there was less traffic. When I lived in NYC (just before covid hit), none of my friends owned cars even though they all had the means. It was just too much trouble to park them and maintain them for the few days a year you need a car if you mostly hang out in the city. And driving is a pain if you're mostly in a city -- the NYC lifestyle is very alcohol heavy and for a lot of folks only spans a couple of miles on an average day. Not exactly a huge benefit from cars there.

100% agreed that we should reclaim parking space and lanes from cars, though. Perhaps congestion pricing will temporarily empty the streets and give the city ammunition to reclaim that space? A smart city would enact congestion pricing, downsize the largest avenues before rideshares figure out a way to exploit the opportunity, and then use that reduced main throughput to justify downsizing and pedestrianizing streets across the city over the next few years. But I suppose they could have done that during the covid traffic downturn, too, like how Paris and London seized the empty streets to expand bicycle infrastructure and pedestrianize streets around schools.