One interesting concern this raises is what this is doing to the housing stock. A well-known problem in cars is that people without much money tend to buy used

One interesting concern this raises is what this is doing to the housing stock. A well-known problem in cars is that people without much money tend to buy used cars, while those with more buy new. That means that new cars tend to be aimed at richer buyers, which can make them less good for people with less money. E.g., in my youth I knew people who drove giant rusted "land yacht" cars and spent too much on gas. Today you'll see a similar phenomenon with giant old SUVs. In housing, I've seen plenty of apartments that had been carved of of the mansions of yesteryear. A friend who recently bought a house in Austin said that finding something small enough was a struggle. He saw a lot of relatively new construction that was 3k+ sq ft, when he and his family wanted well under 2k so as to minimize upkeep and leave more greenery. I have to wonder how much the relatively wealthy boomers are influencing what gets built, and how that will continue to be a problem long after they're gone.