Partially it's just really hard to move, visas can be hard to come by and moving away from family is difficult. For what it's worth though my parents currently

Partially it's just really hard to move, visas can be hard to come by and moving away from family is difficult. For what it's worth though my parents currently live in Amsterdam (and love it) and my in laws moved to Canada. My cousin moved to New Zealand, my uncle to Rome, and my wife is trying to convince me to go to England. It's obviously an outlier case but about 1/4 of my family has left and they all seem to prefer being out.