To me the point is more that the post WW2 boom and the resulting ability of a cashier to buy a home and support a family was somewhat an aberration, not a new normal. Something similar could happen again if the conditions were right (much more modest house building via major zoning reform, free education, healthcare, and childcare, high taxes on the wealthy) but we’re not actually achieving those necessary things politically, so here we are. And even if we did achieve all that, new homes won’t look like current new homes because 4000 ft2 suburban homes are fundamentally unsustainable.