"Why does a smartwatch need to have a local cache of MP3 files? Well, the use case put forward is that the owner goes jogging, but still wants to hear some music, but doesn’t want to take calls. So the Apple Watch can store music locally, but your calls go back to voicemail, on wherever you’ve left your iPhone. "
The article seems to contradict itself throughout... The above was meant to be (I think) an example of how there were too many features, yet then basically yells "HA!" and criticises it because it doesn't have enough features like taking calls? Baffling.
I completely understand why a fitness tracking device, in fitness tracking mode (jogging), only does music and fitness.