Sorry. I was referring to the author’s claim that demand for large homes dropped because people have smaller families.
A little common sense will show that people with no kids have more disposable income that they can apply to a larger home if they wish. IOW, DINKs can afford a larger home than people with kids.
Personally, I think a couple living in a 10,000 SF six bedroom home is a little strange, but I can guarantee you there are a great many of them.
It's also worth noting that a major influence in the housing boom of the last 10 years was this bizarre scenario involving illegal aliens building new homes for other illegal aliens who were willing/able to pay exhorbitant prices for them because of lax lending standards.