Is there a limit to growth
The real problem re: abuse becomes enforcement and with cities all cutting back on services the eventuality of the micro units being shared becomes a problem no different than any other sized unit. Pricing of studios in NYC and D.C. as an example is high to where sharing a unit is common. Above and beyond growing vertically one must ask if limits to a city's capacity actually makes sense in order to preserve the quality of life that might be the city's key attribute. Looking forward in time is a San Francisco with double today's population still attractive? There are sommany other issues. Does adding 50 people via micro units to a city block, half with cars, change the parking convenience of a neighborhood?