Yep, and many times we end up with lousy products despite all this work. Case in point in the xkcd comic: the switch on the lamp cord. What an utterly idiotic idea; it's only done because it's cheaper, not because it's better for the user. In fact, I'd assert that lamps, in general, have some of the very worst product design for any class of modern product. They haven't improved substantially in many decades. We have amazing LED lighting now (as seen on the headlights of new cars, both the DRL systems and also on some cars which use LEDs for the main headlights), but our table/floor lamps are still unchanged from the 1950s, designed around the ancient Edison bulb, with horrible user interfaces (switch on cord where it's hard to reach, or switch next to bulb where you have to stick your arm up inside the lampshade and try to find it in the dark).