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.

Why would you buy an iphone if any cheap $100 android phone will do good enough?

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.