Regression-test: I find it weird that "webdev people" suddenly started talking about #featureFlags in 2015. (or so). Or maybe talking about them were I could hear. I know there are annual "add this topic as new" lectures/ training events, for people with less experience. But on this detail, how did I not notice them in 2012-2014 if the feature-flag topic was annual? Older Linux/ unix tools have been using feature-flags since 1960 or some thing. Vim is a clear example.