All of the various gadgets we have all have their own power cords. We tend to misplace them from time and often have to replace them. When I see musicians perform, whether in a concert I see microphone and power cords running all over the stage and wonder if they can keep track of all of them. Also cords like an exciting boss psa-120s provides what they need to power pedals and other devices that require 500mA of power. So I know how frustrated I get when I can’t find the cord for my phone, I can imagine how frustrating it would be for a professional to find out a cord was missing. It is always a good idea to have spare or two on hand.