What a crock - what cautionary tale? A company that grew really fast, is still producing lots of cash, and is already public? Companies rise and fall and are dependent on lots of other forces. Airbnb could crash any time if cities decided they don't want it (I doubt it will), same with Uber, and TONS of companies are in some way dependent on Google not shutting them out.
Seems like this was a pretty crappy business with extremely low value added to the world, but it's so obnoxious to hear every single company that starts to decline or doesn't grow the way we thought it would as a "cautionary tale". Companies grow, companies die.