[rayiner]

This isn't really true. First, what's considered "big enough to raise a family in" has doubled since the 1950s-1970s. I grew up in an 1,100 square foot house built in the 1950s. The starter homes around us are double that size.

Also, as the U.S. grows, the "frontiers" obviously shift. Since 1970, the U.S. has grown from 205 million to 330 million, and the number of people per house has gone down significantly. Back when it was built in the 1950s, the house I grew up in was in a new development in a boring suburb of D.C--itself a boring city with mainly GS-scale government jobs. Now, with all the tech jobs in the D.C. area, it's become a more desirable, upscale place.

What used to be the boring, middle-class suburb is now somewhere around Kansas City, MO or Greensboro, NC. Houses in those places are just as affordable as the houses you grew up in. In fact, when you account for growing house size and falling interest rates, they are more affordable: https://donsnotes.com/financial/real-estate.html