alt Hacker NewsThat's not what we mean when we say that phrase.
They actual had the eternal September problem, which they were always going to hit, but managed to stave it off for a decade or so before it became overwhelming.
From your perspective as a question asker, the community was too strict. From the unpaid volunteers perspective, they were drowning in dupes.
Eternal September was never a problem for SO, it was an asset. Duplicate questions was never a problem for those asking or answering questions (I did both), only for a relatively small group of loudmouthed moderators. Now they hardly have any dupes to worry about but they also have no content to moderate!