I could see an app being useful for notifications when a often booked, popular location comes available during a timeframe that the user selected. Or providing

I could see an app being useful for notifications when a often booked, popular location comes available during a timeframe that the user selected. Or providing an immersive experience for viewing the layout of the rental and areas outside the rental, for example. Unfortunately, Airbnb would rather geek out on a silly framework that accomplishes little more than avoiding the implementation of 2 relatively simple native apps and making it harder for new developers to come online.