That's not what I've seen, most older Chinese parents tend to go through the "break up" syndrome, where after some time they begin to romanticize the good memories and slowly forget the reasons they had for leaving, the "cultural bubble" doesn't help either, think of it this way: If you moved to China today 10/20 years from now you will remember USA as the one in 2022, and thats gonna be your perception of it, because you are not a participant of the everyday small incremental changes happening every day.