My favourite example of this is my iPod nano: it has a built-in speaker only to make a clicking sound when I use the (non-mechanical) clickwheel to browse throu

My favourite example of this is my iPod nano: it has a built-in speaker only to make a clicking sound when I use the (non-mechanical) clickwheel to browse through menus. The speaker is used for nothing else. If I have my earbuds in I can't even hear it. It only exists to say "click" whenever I scroll up or down a menu. Logically, there is no reason to include such a useless feature into an MP3 player. But apparently the perfectionists at Apple's design department felt the clicking sound of the mechanical wheel on the old iPods was an essential part of the user experience. And that's the difference between Apple and the manufacturers of cheaper clones.