Northern Europe has harsher winters than I care for. You can freeze to death in the snow...etc. And the odds are long against me moving there any time soon. I can readily go anywhere in the continental U.S.
I have actually seriously considered such things. I have previously lived in Europe. I have been willing to consider living potentially anywhere in the world. There are substantial obstacles for the average person for up and moving wherever the fuck place name you pulled out of a hat.