Even though I agree it is more of a western thing, I would argue it is also maybe more of a "recent" / urban trend. I am originally from rural Western Europe an

Even though I agree it is more of a western thing, I would argue it is also maybe more of a "recent" / urban trend. I am originally from rural Western Europe and a few years ago grandparents, parents and kids all in the same house was still a common sight. I would agree that people look for more independence these days but I feel like in some places it is still fairly recent.