What major change in getting what you need and want occurred during the industrial revolution?

The industrial revolution brought about an explosion in the capacity to manufacture identical goods. This made it possible for items which had once been relatively rare to become quite commonplace. A good example is the clock. Before the advent of industrial processes, each part of each clock had to be manufactured by hand by a master clocksmith. Industrial processes allowed the parts to be mass manufactured and assembled, which made clocks much more common and affordable.