Just thinking about the all important medical issues, I have some stories from my own personal experience with family members.
I actually posted here about one of them. My Bro-in-law.

If you're planning to spend significantly on a medical insurance plan, then from my perspective you'd better be prepared to live within a short radius of a top quality hospital.
The only way that serious or emergency medical attention can be administered
is if you are actually at the hospital within a safe period of time.
That kind of limits your residential location

I'm sure that some form of repatriation insurance can be of benefit to some folks.
But do be aware of what Rosie has posted. If you're lucky enough to find your way back to blighty and you're lucky enough to have survived then I doubt you'll get international insurance cover ever again.