You may be right, but my information differs. From what I am told, there is first of all a large and continuing migration from Puerto Rico to the U.S.; something I think we agree on. However my sources on the Island tell me that South Florida is the number one destination and particularly the Miami area. An obvious reason for this is that Miami has a huge concentration of Spanish speaking citizens. There are entire sections of the city where English is rarely heard. But there is a second and equally, if not more, important factor and that is the existing population of Puerto Ricans. Some major metropolitan area have even more Spanish speakers, Los Angelos has twice as many as Miami! But the concentration of Puerto Ricans is much lower, as is the concentration of Spanish Speakers (but not by much). Both New York and Chicago have a much lower concentration of Spanish Speakers. New York has the highest number of Puerto Ricans followed not far behind by Miami, but Miami has twice the concentration of Spanish speakers, not to mention the climate is like that of Puerto Rico. Revisit this topic in ten years and you will likely see that I am right. South Florida will be the number one recipient of Puerto Ricans currently migrating to the U.S. Whether it will eventually be enough to turn the political Table is a guess, but it seems it could be, as Florida is already purple.
I don't share at all your assessment of Puerto Rico's future. I believe it could be brighter than it has ever been since the Spanish American War. But it depends entirely on how forward looking U.S. policy becomes. We can't expect anything very positive until Trump is off the golf course and out of the Oval Office. It is almost as though we borrowed a Puerto Rican politician to be our President.