By random happenstance, I was browsing through an old thread ("I'm going to eat your children."), and I stumbled over a barnburner of a comment from 24 years ago. The original statement is in reference to Mike Tyson, and then there’s this reply:
From June 2000. 
Yes, it’s sometimes fun to go back and chuckle over comments that didn’t age well, that look silly now because things didn’t work out as originally expected or because the underlying assumptions proved to be unfounded (“I’m confident JJ Abrams has what it takes to wrap up the Star Wars saga!”). This is not that. This is about celebrating posts which might have seemed relatively innocuous in the moment, but which have stood the test of time over years and years, to the point of perhaps looking even better now than when they were written.
Also, to be clear, this isn’t just about comments which were initially amusing and remain amusing due to cleverness or humor. This discussion prompt necessitates an element of being forward-looking in some way, even if it’s only obvious retrospectively, highlighting an observation or argument which has endured.
And, finally, despite my example quote above, this thread shouldn’t be limited just to politics (though I’m putting it in IMHO, after mod consultation, because it’s generally a fairly flexible forum, subject-wise). For example, if you know of a 25-year-old post where someone describes enjoying the first couple books in a newish high-fantasy series by a guy named Martin and suggesting it would make a popular TV series, that’s perfectly on point for the thread.
So let’s dig into the archive, and share wisdom that deserves to be carved in digital stone. It’s probably best if you’re celebrating someone else’s wisdom 
but if you’re particularly proud of an old observation of your own, share away.
P.S. Incidentally, yes, I’m aware the quoted poster above hasn’t been here for a few years; he initially didn’t make the jump to Discourse and as far as I’m aware his current status is unknown. If he’s still around and interested, maybe the positive attention brings him back. In any case, it’s necessarily a side effect that a discussion like this might include some now-inactive folks. No worries.
P.P.S. Incidentally, I’m not defining a date cutoff that makes something “old.” It should simply be old enough to be interesting.