We're empty nesters. I don't know what I'd do if my son wasn't just a half hour away. We visit each other frequently.
However, he and his partner are seriously considering moving to the UK or elsewhere in Europe. She has dual Italian/American citizenship. He has dual Iranian/American citizenship; but that could actually be detrimental if Trump seizes power again. Conservative lunacy and the specter of Trump in power again is part of the lure to immigrate. Better work/life balances has a lot to do with it as well. And, the both have family in Europe — she in Italy and he in Germany where two of his four uncles live, and several of his father's cousins.