If everyone's climate was like Vienna's, air conditioning wouldn't be all that necessary. I swear that the better the climate, the worse the NIMBYism.

If someone magically erased NIMBYism from Marin County, California, within a year it would become extremely affordable with much less environmental impact per capita.

We had a similar plan in Switzerland where a constitutional target of 10% of non for profit housing could have been set. Unfortunately, a large part of the population are labour aristocrats so they probably saw themselves as potential future landlords and saw it as a threat against their old age income.