I'm surprised to see the pessimism here. For a family of 5 AirBnB is far better than hotels. I'd much rather get a whole house than cram everyone into a single hotel room. And I can't remember the last time I had a bad experience. Maybe the "whole house, multi-bedroom" segment is different from the typical AirBnB experience?
It's a fair criticism when there's some restrictions on supply. In SF about 1.5% of housing is on AirBnB. Is that tiny? Lots? It's probably not enough to move prices either way.