At least in my Cambridge neighborhood, all of the properties that have been touched by investors and developers are being turned into very, very expensive condos. Or biotech labs. You'd think we had enough of those already, but no.
But zoning gets in the way all the time. For example, Somerville was going to get a new development in Davis Square. And the developer jumped through all the hoops. The city literally changed the zoning map so that they could only build labs and no housing.