Several reasons, we moved to Montana from Australia six years ago because it was too hot in Aus. and the skiing, which we love, is really expensive with very variable conditions and a short season. Also, at the time my husband's mum, who was in Florida, was in ill health and by herself. We adore Montana but are freaked out about the current situation in the USA, too much uncertainty about too many things. I've never been very political but it is impossible to avoid here.
We also have always wanted to experience a different culture and learn a new language. Having been self employed most of our lives we hanker for a slower pace. We have never been very good vacationers, we prefer to go somewhere, stay and embrace the local community. We are considering the Chapala area, Boquete in Panama and a couple of places in Spain so we have a bit of traveling to do before we finally settle. My dental situation is pretty tragic (long story) so we will be there at least 3 - 4 times in the next nine months.
Initially we will keep our house here because we will want to come back for a few months each winter to get our skiing 'fix'. After that, who knows, we are gypsies at heart.