Do you have examples to share of companies who were as devoted to talking to their customers and making something people want as Airbnb, but who failed to build a successful company?
That YC W09 batch had about 16 companies. They were all far less successful than Airbnb (though some of them did well and got solid exits, and others live on and are going OK, like mine). But none of the companies who did less well than Airbnb were remotely as engaged with their users as Airbnb was. It was blindingly clear, even in the first month of the batch.