I understand, but Florida does still require residency for them to be able to vote in Florida. For PR to affect Florida’s election substantially would required massive amounts of their citizens to qualify for residency in Florida.
That may well be, but I’d suspect that concurrent with that is a massive amount of fraud and corruption associated with it - like PR citizens trying to claim the benefits of both places as in SSDI for being disabled in PR because you only speak Spanish, or not paying part-year income taxes and associated US pay for Federal Income Taxes, etc.
In any case, while maybe impactful it is likely largely fraudulent in my estimation. And if a clear government commitment to weed out those not actually qualifying were undertaken (say by a real conservative governor) that impact would diminish. Regardless to me it is not that Great Brown Hope Democrats hope and quisling concern Republicans fear.
If you moved there tomorrow and showed them proof you had a residence there, they would allow you to vote in the very next election being held there.