> Many areas with rental unit shortage have that shortage because zoning does not allow for high-density construction. The easiest solution to any shortage is to simply increase supply.
London says Hi!, where every garbage building that has some semblance of age is marked a Listed Property, and where it's more fashionable to let people be homeless/living in refurbished toilets than to build taller buildings because they would "destroy the character of the city".
Also AirBnB just gets blamed for the rental shortage in many communities. The truth is poor zoning results in a shortage of rental units. Many areas with rental unit shortage have that shortage because zoning does not allow for high-density construction. The easiest solution to any shortage is to simply increase supply.