I'm not very well informed, but couldn't we figure out how to improve loan availability for condos in 5-3 over 1's? I think that would make a much bigger impact.
Everything else is just piddly details on exactly where & how & how much water is inevitably flowing downhill.
And whatever sepia-toned tales of the quarter century from 1945 to 1970 are currently being told by right-wing folks, that was a period of enormous change.
(Yes, in philosophical theory, "NIMBYism only requires that someone not like change". But getting from there to "that desire often prevails", in the real world, requires the support of very large social, regulatory, and legal structures. You might want to talk with an old attorney in this area, or someone on a local zoning board.)