I live with my husband and oldest son who's 17. My parents live with my grandparents and my oldest son who is 20. At some point my grandparents will not live there and the plan is for my husband and I to move in with my parents to assist them in their older age. I think families should do this as much as possible. People want to remain in their own homes as long as possible and this helps this happen. My grandpa will be 99 in sept. No indication he will pass on anytime soon really.