That's really not much different than the situation a typical very old person lives in now. My grandmother is 95 and has found the world bewildering for decades now. She's a widow, and all of her formerly numerous friends are dead or senile. Her old neighborhood is gone, modern entertainment reflects attitudes that are alien to her, etc. She has descendants she sees sometimes, but some other people her age don't even have that. Yet we don't see them hurling themselves off of cliffs very often.