- forget high density cities, in the post "fossil" fuel era they simply don't add up. Unless we go full nuclear and can afford to waste.

- dispersed does. You need the space and roof surface for direct local food, water, energy production. Work for a large part can be remote. (and travel with an Aptera :)

- brillant passive and active solar house designs have existed since the '40.... so why are they not our standard? 80 years wasted. Who has prevented that from happening...and why did we let them...

https://web.mit.edu/solardecathlon/solar1.html

- because I have designed and built mine ..zero energy

https://cc-studio.nl/works/kashuis/

and I don't have to worry about the energy prices ever a again. 80 years wasted.

- warm water production (high temp) is critical but now can be bypassed with solutions like https://www.upfallshower.com/

- and thermal seasonal storage is next comming