I feel that many may make the initial move to please a partners wishes. However, they then do not settle because their hearts are still in the UK. I would imagine that this would be a very difficult situation for any family. A partner pushed against their wishes can lead to resentment, loneliness and a feeling that they will never settle could lead to a self fulfilling prophecy.
As much as I know my heart and soul belong in Australia, had my husband not wanted to go to I would have to stay (thus facing resentment building anyway) - or go without him, ending our relationship - not something I want to do!
I suppose I am just very very grateful that we share the same dream and are prepared to make that dream work.