FBiOS is almost certainly the biggest and most complicated mobile app in the world (edit: perhaps outside of Asia, whose mobile app landscape I’m not familiar w

FBiOS is almost certainly the biggest and most complicated mobile app in the world (edit: perhaps outside of Asia, whose mobile app landscape I’m not familiar with). There is a truly dizzying amount of features, different types of news feed stories with different behavior, etc. Everything described in this article (or at least the parts I have direct knowledge of, which is a sizable chunk of it) was essential to force the thing to continue working at all. It’s not over-engineering, it’s over-producting: Facebook (err… sorry, “Meta”) is politically and culturally incapable of cutting bloat, making engineering solutions like these necessary.