@glynmoody Could this trend in California and Florida possibly benefit low-income people? Rich people tend to need financing to support the expensive buildings that banks require when financing construction on desirable lots.
If insurance isn't practical, financing won't be practical, lowering demand for expensive buildings, and then maybe it will be possible for middle-income people to use cash to build cheap but safe housing on desirable lots?

@glynmoody The low-income people would only benefit if single-family zoning was rescinded. Then multiple families could share housing built by middle-income people.
In case of hurricanes, etc., the housing would need to be rebuilt. I have no idea how that would work if the middle-income builders were renting to low-income families.
It does seem like this market disruption could be an opportunity for change, though.