Modern New York has a great deal of black influence in the way people speak. And, possibly, a Hispanic infusion. And, of course, mid-20th century was dominated by the Jews and the Yiddish contribution. That, gladly, still hangs on.
Re. cultural influences on NY accents - - -
Occasionally I’ll purposely put on one NY accent or another (because I’ve lost my natural NY one, truly), and end up saying, ‘I’m ‘allowed’ to do that because I’m from New York!