I helped a friend at the gym fix their hotkeys in Windows when some out of date writing software started screwing with it. Outside of that, I've learned that we

I helped a friend at the gym fix their hotkeys in Windows when some out of date writing software started screwing with it. Outside of that, I've learned that well-tested (user tested) UI of any kind is some of the most impactful work a software dev/designer could be doing on a regular basis, regardless of what backend devs or w/e will tell you. Making a scrollable area more clearly look like a scrollable area, or making a password entry process less arduous, is incredibly important work, if not only because it saves some other people from being confused and wasting energy on a problem they shouldn't have; this is particularly true of any public service interface stuff.