And you are right.
What if these new transplants into Florida flock to Broward or Dade county? Then Florida goes solidly Blue forever!
If taxpayers leave a Blue state for a Red state, then the Red state gets redder. If nontaxpayers and other assorted leeches and slugs leave a Blue state for a Red state, then that state can go from Red to Blue. It all depends on what type of person is leaving the state that dictates if this helps or hurts the current Red states.
The key point is that "blue staters" are aborting future liberals, and conservatives are raising future voters.
Wonder when they will figure that one out?
The hole in your logic is that blue states offer better benefits to non-workers and marginal workers. In shor tthe very things that make a state blue are the things that retain blue state voters. Meanwhile red voters move to red states to avoid paying for the welfare that blue states use to buy Dem voters.
There are some scary trends of some red states getting bluer with the influx of California voters. Think Montana, Colorado, Arizona, and Wyoming as a start.
You forgot Palm Beach.