This, there are literally thousands of comments on HN saying so and so, similar to the parent, but I've never got the impression on the ground in real city suburbs that even half the voting population would desire such 'innovations'.
And that's across quite a lot of cities in the US and Canada.
Most families who can afford to are willing to pay a huge premium in order to not share walls with a neighbour, even if it's only a few feet of grass and adds a longer commute.
Whereas most of the opposing sentiments I can only find as talk by random accounts online... and not in actual behaviour.