Comment by tptacek

The muni I live in is very constrained (we're just 4 square miles, right on the border of the west side of Chicago) and our land is overwhelmingly SFZ, so most of the ballgame is getting SFZ lots opened up. The emerging consensus is towards "missing middle" housing, which is 2-40 units (but really, a medium term sweet spot in the teens), where you're talking about buildings spanning multiple lots.

That very little can economically be built on existing SFZ lots even with relaxed zoning is actually a feature, not a bug, for getting this done. People want change to be slow. At least to begin with, it's better strategically if it takes a couple years and gradual tweaking to make lots of building happen.