A 30-year-old mapping brand made one choice at exactly the right moment, and suddenly it’s the #1 downloaded app. Remember MapQuest? I used it constantly in the strange little window of time between paper road maps and having GPS in everyone’s phone and car. You’d type your destination in a desktop computer, print pages of turn-by-turn directions, then drive around flipping loose sheets of paper. And every so often, MapQuest would confidently send you the wrong way down a one-way street. Good...