People are attached to their CHARACTERS, only kings and dukes are attached to their fiefdoms. As long as they can take those characters and live on in a new location, no one has lost anything.
I don't think that's accurate. Quite a few people have declared their particular attachment to an island/s here on the forum. I can think of quite a few players who only play on one island. Perhaps they like the atmosphere and dynamics between the realms on their chosen island. I know I certainly prefer playing on two particular islands more than others.