Agreed that it's unfair to call it a failure. GoPro is what most people think of when you suggest filming something sports-related. They made a product which does what it says it does, and has become a very recognizable brand for action filming. Nothing lasts forever, I'd mark their efforts a success.
What does this have to do with classifying them as a success or failure?
But while we're on your topic, don't forget there is value in brand recognition and trust in a company which isn't a random Chinese vendor. And why do you think the Chinese clones exist at all? They followed the success of GoPro.
For enough people a premium iphone is worth the wait xtra cost, which is why Apples smartphone profits are greater than all other smartphone makers combined.
