[swatcoder]

The housing crisis is not universal. The last few decades saw a trend towards re-urbanization and re-centralization after the prior several decades favored flight from urban centers into sprawling suburbs.

That's culminated in excessive demand for housing in areas that are already heavily developed with existing structures and land-use, and pressure for demolition/reconstruction and rezoning for higher density, which is not easy to achieve.

Modular, manufactured, and kit homes are almost universally single family structures which don't do much for that problem. They have a place in ADU (accessory dwelling units) construction that marginally increases density in some neighborhoods or certain kinds of creative urban developments, but mostly just make it easier and cheaper to build out new land in those places that many currently don't see as desirable.

That said, in the big picture, continued innovation in that sector helps ready for the inevitable pendulum reversal as people recognize their urban centers as inaccessible and/or blighted and adopt a new vision of their own future. But that's not a "today" solution or really something that can be controlled very well at all.