I think, as the others have already said, I don't think anyone knows how things will be. How far away are you from potentially making your move?
That aside, one of our Brit neighbour, overseas, had fibromyalgia and she always says she is so much better there than in UK; especially in winter, when it's warm there, but cold here.
Is your intent to sell up and move, or keep a UK base, but have a home elsewhere?
I know of a number of regular visitors to our part of the world choose to spend winters overseas, in the heat (a steady heat of around 28-32c in winter) and be in UK during the summer when things are warmer here, whereas the Tropical summers are utterly brutal. Many will rent a villa or house for a few months, rather than invest in bricks and mortar. With that sort of term, they achieve better rents than short term true holiday lets.