I think there's some similarity between what's happening in Florida and what's happening in Arizona. There are some key differences between Florida and Arizona though.
One of the primary reasons of recent decades to move to Phoenix or Tucson no longer applies. From the mid-1990s to mid to late 2010s, Phoenix and Tucson (more so Phoenix) were flooded by West Coasters (primarily Californians) and Chicagoans looking to escape higher cost areas. Rents and home prices in Metro Phoenix and Tucson were affordable. Both Phoenix and Tucson are no longer as affordable on housing costs and overall costs of living as compared to 15-20 years ago.
The same thing is happening in Florida, except Florida generally attracts people from the Northeastern and Mid-Atlantic states.
There is not a good base of corporate employment in Metro Phoenix. I've heard similar things about Metro Miami. Few top companies have their headquarters in Metro Phoenix, so a lot of the general business jobs are lackluster. If your job is in the medical industry, Phoenix has a decent employment base. The medical industry has always done quite well in Phoenix due to the fact that the area is a hub for retirees needing medical services. I'm not sure how Miami/Fort Lauderdale, Orlando, and Tampa compare to Phoenix in this regard, but I think there's some degree of similarity.
I do think both the populated areas of Florida and Arizona are better for vacations or retirements than living there full time.
@I_have_BDE has lived in Naples/Fort Myers, a retirement area further from the action of Florida. There are retirement areas in Metro Phoenix like Sun City, Sun City West, Surprise, and Goodyear in the West Valley. If someone younger were living near the retirees in the West Valley of Phoenix, they would only have to move 20-35 miles to be near Central Phoenix, Tempe, or the parts of Scottsdale where age appropriate people live. In Florida,
@I_have_BDE has to move further to Tampa, Orlando, or Miami/Fort Lauderdale to find age appropriate people.