GetRichSlowly has a similar, and similarly fascinating, article up:
https://www.getrichslowly.org/american-home/
I read "Life at Home in the Twenty-First Century: 32 Families Open Their Doors", the book based on the research, a few moths ago. I think I heard about it from a Forum posting. Strongly recommended! Lots of photos for the looky-loos among us. :) It was available from my library. (Also interesting to see how many middle class LA families in the study were living in versions of 1950's or 60's ranch homes, not in McMansions.)
We're 2 people in a 2200 sq.ft bungalow; 1100 sq. ft. on main living floor, 1100 in slightly finished basement space. It's plenty of space for sure but after reading the book I analyzed our space use and realized that we were using some spaces much more than others. In fact, not too different than the families in the book, which kind of shook our self image.
As well as taking a harder look at what we're storing and how much TV/computer time we're spending, my biggest takeaway was that we were not organizing our time and habits to take advantage of our deck and back yard so we made changes there. Morning tea and afternoon gin and tonics on the deck! Tea daily; G&T's less often. :)