what will happen to a shoe that is worn too often? will the leather turn to dust in front of your eyes and then explode in a flash of white smoke all while you are giving a presentation to an important client? or will something more subtle happen, like small cracks start appearing at the creases? or even more subtle, the leather starts to rot from the inside? how long can one reasonably expect a shoe that is worn every other day to last, with proper care?