I am a steadfast exurban/ruralist at heart, but I agree that we need to increase city density and not expand the land footprint with urban sprawl. I prefer the Helsinki social housing solution. I think it is more intellectually honest to make it clear that the state takes the financial loss to bring housing costs down instead of completely forcing it onto the builder or the property owner.

I know this is an unpopular opinion, but cities don't change because it is too costly to rip and replace in terms of dollars, disruption to parts of the city, transportation, etc. However, I do think that rip-and-replace is an important strategy for improving housing density in the city and correcting past mistakes.

I do worry about the impact of higher-density living. I think people will lose touch with the natural world. Being outdoors in wilder spaces will become a tourist experience rather than an appreciation and understanding of the wilder parts of the world.