I've lived many years in Tampa, and I'd like to contribute some more anecdotal evidence.
But first of all, the UV in Florida is not as strong as it is in drier regions, as the higher moisture in the atmosphere tends to filter out some UV. I have not gotten sunburned as fast in Florida as I have in California, Colorado, or Oklahoma, for instance.
Cars really do take a beating in Florida though, especially on the coast. I think the culprit is not so much the salt nowadays, but the sand combined with the heat and frequent rain, encouraging mold and abrasion to attack everything. Damp grit everywhere can make a car look like it sat at the bottom of a swamp. But with some discipline, such as always parking in the shade and frequent rubdowns of all rubber, vinyl, and leather parts, I was able to keep my cars in pretty good shape.
There are much more valid and worrying reasons for avoiding Florida than the climate....