Please no. There is no need to squeeze new buyers and force them into subtandard conditions. There's no reason cities can't redevelop 2 neighborhoods to 10 stories instead of 1 neighborhood to 5 and still have livable 1-2br apartments. The "where will we fit everything" issue is manufactured by NIMBYs who think a designated area for micro-housing or single story ADUs in the backs of lots will spoil their views less. It's another way to maintain the class boundary while appearing socially responsible.