OK, now answer my question.there was white flight and black middle class flight in other cities too. and most of the AA migration to NYC was before the 70s
Why didn't hip hop come to Miami until the early 80's if west Indians played such a huge part. In fact rap music became popular in the late 80's there. Before that it was about electronic dance music or as they call it booty music. The environment was, and still is, the same as NYC.
I know the answer, and even told you, but I want to see what your answer is.
BTW, the mass migration was in the late 60's, right when hip hop and disco started. I can make the same connection you are making.