I mean, Flappy Bird was popular in late 2013/early 2014, nearly 7 years ago. If you’re a HN reader and currently aged 16 or 17 years old, you would’ve only been 9 or 10 years old at the height of its popularity. Somewhat reasonable to not know about it at that age, so it is entirely possible that some people on HN might not know about it at all.
If you’re willing to put in effort and storage, flashpoint is a good way to play flash games of yore. It’s a pretty large archive, but there are still one or two games from my childhood I haven’t been able to find (or name, what a distraction that feeling is).
Ha, well, thank you for giving me the benefit of the doubt. But I am 32 and hopeless when it comes to following popular culture. I was probably just focusing my attention on something else. I have a solid track record of not noticing stuff. So the nuance added to xkcd 1053 by this story is that the average value of ten thousand per day is just an average :)
(And another nuance is that I am not in the US and so also not part of the ten thousand per day average.)