This is the real answer, not the pat “no one builds new used cars” nonsense. It is entirely possible to build new, no-frills apartments that are 100% habitable and to code. But because of all the regulatory boxes one needs to check — namely all the fees spent, and time spent waiting for seemingly endless approvals — it is simply not possible to rent out bottom-dollar builds at a low market rate. The same logic applies for single family homes sold for purchase. The startup costs are just too damn high.
You are right of course. I was being flip. There are multiple reasons it is no longer profitable for car companies to make small trucks. CAFE regs are part of that.