Perhaps it is more than a bit difficult to copy Apple. Horace Dediu:
Itâ€™s complex, itâ€™s subtle, it defies explanation but itâ€™s not magic. Itâ€™s a process that requires a degree of faith and fortitude. Itâ€™s collecting but ignoring data and trusting judgement when data tells you to move in a different direction. Itâ€™s a lot of willful rejection of conventional wisdom. Itâ€™s asymmetric approaches to competition. Itâ€™s art as much as science. And most of all, itâ€™s a lot of mind-numbing polishing while trusting that only by doing great work is survival even possible.