I didn't imply that 3d printing should fix the materials problem, I simply hope that the materials problem gives 3d printed housing enough room financially to achieve economies of scale to bring the prices down for those situations where 3d printed houses are specifically relevant.
Consider as one example low income areas that are filled with housing built in the 40's and 50's which can now be razed and replaced without inadvertently causing gentrification.
Unless those houses are irretrievably dilapidated and neglected, why raze them? Seems more sustainable to re-use something that's already there.
Agree that some areas like Detroit that have houses that have been abandonded, scavanged, vandalized, and left open to the elements for years are in most cases not salvagable.
