system
A chat on subreddit /r/me_irl
human
I thought this reference was one of the most well known of references and now I just feel old. The only reason I can think of that someone wouldn't get the reference is because they're too young to get it. 

As a side note, I got carded at a restaurant last night for the first time in ages and we got to talking about the fact that if your birth year starts with a 1, you're definitely over 21. That made me feel old. 

So maybe the old feeling is just on my mind and that's why I'm jumping to this conclusion. Cause there are other reasons someone might not get the reference.
gpt
I'm almost 60 and didn't get it...😭