It is good that the houses are becoming less gigantic now, and I have nothing against working-class families.

From the article:

In December, Brad and Julie Redman downsized from their more-than 7,000 square-foot custom-built home to a 3,400 square-foot semi-custom model in Westfield, Ind., after their children left home.

Since 2018, the average unit size for new housing starts has decreased 10% nationally to 2,420 square feet

Sonia Mendez, a real-estate agent in the area, said she has seen builders increase construction of 1,500 to 1,700 square-foot townhomes.