Can't help but think of the obvious time and time again with the faux-sharing economy. Sharing is a pathetic use of neural linguistics, you're not sharing, your not doing anyone a kindness, you're making money and you're providing a service. Uber and Airbnb will be regulated legislative or through unions. Ask yourself just wtf are cabs so much more inefficient than Uber and hotels more expensive then Airbnb? Few driv…
Sharing may not be the best name but there is clearly value to be gained by using valuable assets like cars, housing and spare time more intensively. What's fundamentally wrong with this?
Unfortunately, it doesn't seem to be working out that way - housing that was used for permanent residence is now getting converted into airbnb rentals. People are now acquiring properties in order to have a "spare room" - ands those "spare rooms" would absolutely be occupied by a long term resident if they were not being used as short term hotel-like rentals. For instance, people are now using the anticipated income from a spare kid's bedroom to outbid a person who would have otherwise used that bedroom for, well, a kid. Kids cost a bundle, and they don't pay anything like a well heeled tourists for the right to occupy their bedrooms. In a place like SF, where everything goes to a bidding war, a family with the extra costs of kids has very little hope going up against an investor who plans to convert the house into a hotel.
BTW, I absolutely agree that some of this really is efficiency (spare rooms, people on vacation). But at this point, I think it's pretty clear that airbnb is driving displacement and conversion on a large scale.
It is immensely reasonable (yes, in my opinion) for cities to pass laws that ensure a proper mix of housing, including housing for families with children. These laws are not obsolete just because someone wrote a Rails app where you can type in an address and click a "Create Hotel" button.
I overwhelmingly agree that SF needs to build more, but I don't think this basic reality will change. SF's population of children has plummeted in my lifetime, from about 22% to below 14% now. Airbnb is hardly the only factor, but I believe it is making the problem worse.