Those who have adapted it and taken the time to really learn and use it swear by it, which strongly implies there is opportunity for it. It's not so much a product failure as a launch or marketing failure.
Pandora.com, for example, had similar problems getting initial traction, but stuck it out long enough to get over the hump (thanks in large part to iOS and Android), and are now one of the hot 'new' things.
Sometimes I think you can kill promising products too quickly in an attempt to stick with 'fail early/fail often'.