I guess singling out 4 floor walk-ups as something we need more of kind of muddles the point. The scale of the current crop of new apartment buildings is often measured horizontally..  The trend in development these days, in my neighborhood at least, is for developers to scoop up as large a parcel as they can get their hands on, demolish it and build a very large mixed-use complex. Most of them span at least a quarter of a block. Newly constructed smaller buildings get built only when the lot size doesn&#x27;t fit much else.<p>Increasing density around transit accessible hub areas is a strategy championed by city planners these days, with somewhat good intentions. I just don&#x27;t think anyone has really thought through what happens when entire neighborhoods are dominated by massive mixed-use condo buildings. What happens if these areas lose property value? What form does a contemporary condo complex take when blight sets in 20 years from now?