Actually the reference to the joke about cache invalidation being hard is about something else than the article is actually about: the article is about undesired dirty caches and concurrency, while the original joke is about designing algorithm to invalidate caches.
Redditors often bemoan how comment threads are ruined by low-effort commenters making low-effort jokes. It's an easy, knee-jerk complaint that ignores the bigger, tougher problem of bad moderation. Subreddits are plagued by bad moderators whereas HN at least has a few good moderators who can regulate the discourse well.
Some commenters can't tell the difference: they think so lowly of their fellow commenters that even one joke is cancer. Quite a silly condescension given that this one "joke" thread is buried towards the middle of the page and is also producing interesting links like https://en.wikipedia.org/wiki/Naming_and_Necessity
I find it interesting that, while accusing commenters about thinking lowly about others and being condescending, you’re actually doing that exact same thing.
