May have hit upon a winning argument for the NextDoor crowd: because we let housing get so expensive, it is now financially interesting for developers to buy any large lot that is on the market, and do a "hostile" MA-40B affordable housing development with as many units as they can fit on that land (a recent one I think resulted in 12 units, 3 of those affordable, replacing a single-family home. It wasn't a great place to add 12 units, but state law and the invisible hand put them there).
