Most of what I've seen is that it lasts anywhere from a few months to a year or two, and falls apart when somebody gets into a serious relationship and their new partner is not thrilled with sharing space with the ex. Then a new normal needs to be adopted.
Hey man, you could all hang together and smoke weed and call it a commune. That way, no one has to move. But, that arrangement would probably only last until there's no more weed.
