The solution to the affordability problem is trivial: go back to the land. Sure, it would be nice if we could also increase density in urban areas to Hong-Kong

The solution to the affordability problem is trivial: go back to the land. Sure, it would be nice if we could also increase density in urban areas to Hong-Kong-like levels and leverage all the benefits in productivity that would be thereby unlocked, but that's a bit of a separate issue.