American excessiveness.
Why is the average American have 1,000 square feet each? Does little Johnny and baby Suzy each need each that much? No, it is not reasonable or sustainable.
One living room, none of this formal and informal rooms. Who cares about what guests see, as if we keep up on this path, there will be no opportunity for guests to come over.
Only one area to eat also, big enough for the actual needs. Meaning if have 12 people over for for dinner regularly, then sure, have a big dining room. But, the average family is only parents and one or two children.
And speaking of children, if the same sex, why do they need two separate large bedrooms? My brother and I shared, made it work by making a divider down the middle of the room when older (used to have bunk beds).
A bedroom only needs to be big enough for two twins (child's bedroom) or queen bed (parents), a end table, dresser, and have a closet (no excessive walk ins that are large enough for a bedroom). No need having the bathroom be as big as the living room with a shower big enough to be a room itself. Not like the shower is used for anything else.
No need having a spare bedroom either, just put up a screen partition when company comes over. Or the den do also for nursery and/or guest bedroom. I mean, guest bedrooms are rarely used, so therefore excessive.
One and a half bathrooms is plenty for even six people. Has people forgot to share? Forgot how to go to pee outside?
Urban heat island and urban sprawl are true facts and leading to increase of warmer climates. We must be reasonable and take part in the solution: ending sprawl.