alt Hacker NewsAnswers from 2013 likely no longer reflect the currently accepted ways to do things, even for technologies which existed in 2013 and earlier. What you describe is a problem they created on their own with their ridiculous duplicates policy which ignored the fact that the world keeps changing.
Well, a combination of that and understanding human psychology. For any of these common issues, SO usually had an answer of what you were supposed to do, but it was usually very counterintuitive.