Then there are the issues of having a job someplace else and needing a car, otherwise, there probably would be a mad rush.
People fortunate enough to have an apartment in the projects are somewhat trapped. When I was a kid it was realistic to save some money and buy a house in "Blacklandia." For those of you familiar with NY City Blacklandia is what I call the "two-fare zone" bounded by the Van Wyck, Grand Central, Belt Parkway, and the Cross Island. It includes St. Albans, Jamaica, Cambria Heights, Springfield Gardens, etc). It was whitelanida originally but as soon as negros started moving in it quickly became Blacklandia.
Today, housing is so expensive in NYC that it is much harder for people to leave the projects in Harlem and move even to Blacklandia, let alone Atlanta, Charlotte, or Florida.
There are opportunities to move to places like Tulsa (where I lived for 18 months), Bentonville AK, The Shoals in Ll, and other cities where they will pay you to move there.
Still, many people can't imagine NYC -- despite the crime, noise, dirt, hyper-policing of Black people, and high cost of living -- they love NYC.
NYC does still have some appeal, but I'd rather visit than live there -- and I was born raised, and lived most of my adult life there.
This is perfectly reasonable as prior to the hyper-partisanship of today most people held views that were supported by different parties.