&gt; one trick pony ... a worrying thing<p>Apple does more than the iPhone. They have a profitable computer business too.<p>So it&#x27;s only worrying thing for Apple if they start relying on that single product.  If they keep (fixed) expenses down so they can live without the cash cow, then it&#x27;s no problem.<p>It&#x27;s very often the high fixed expenses that get you.   Same with people getting a new job where they earn less: the unsellable expensive house is a problem, eating out too often is not an unfixable problem.