A more general learning we can take from Passivhaus building techniques is that habitable buildings should be designed to work in conjunction with the natural

A more general learning we can take from Passivhaus building techniques is that habitable buildings should be designed to work in conjunction with the natural environment they inhabit, like they used to be before the era of cheap fossil fuels. But such site and solar-orientation aware design isn't today part of the practice of building mass produced homes, and absent forces that push that industry that way, things aren't likely to change.