More people per house can often be a clusterfuck. Even people who are very amenable to each other are liable to develop friction in a small space. Then then the

More people per house can often be a clusterfuck. Even people who are very amenable to each other are liable to develop friction in a small space. Then then there are people's inherently divergent plans depending on family, life, and jobs. The need for people who you would share space with to also pass credit/background checks. Then there is the increasing chance of economic challenges that comes from combining what would normally be multiple households. Instead of the stereotypical 50s where you worry about one person losing a relatively stable job you now have 4-5 unstable incomes where the lose of one may endanger the economic stability of the household. Like a raid0 with increasing number of drives. A famous trope in comedic premises is the friction between in-laws and spouse but this has absolutely obvious deep roots in real dynamics. Life is infinitely easier when your family and spouse just have to care about one another not live with each-other day to day. Furthermore most of the apartment stocks aren't suitable in size for such arrangements and most of the single family housing is presently owner occupied or very expensive and or disinterested in renting to a crowd. This doesn't seem on net a very tenable direction logistically or culturally in the US.