Less space, less people.
Standard nuclear family in a standard nuclear family home. Mother, father, boy and girl. 3 bed semi. Living room separate from kitchen/dining room room, conservatory, decent back garden, downstairs loo and upstairs bathroom.
Now, single parent and only child. A bedroom each. One living room, one bathroom, poky little kitchen, nice size garden as we’re on a corner plot. Rented not owned. It’s a happier home, though.