Some snowbirds will come back, others won't.
A lot depends on what is going on in the States they live in as opposed to Florida.

If a decision had to be made right now by me, I'd have to say that I'm better off in NY. I escaped NY when it was at its worse and came back just before Florida started surging. If I have to be confined, I'm better off here as well. My kids are nearby and I have a big yard to hang out in. The travel restrictions are something to be dealt with as well. George would most likely return because Florida is now his permanent address but NY remains mine and I have to be able to come back and forth without restrictions.