I gave a detailed answer on a forum's question "I'm dying to find this book" asked in 2015.
Someone with too much idle time and not enough to do said something like what are the chances they'll find this answer, if they were dying to find this book they're probably dead now, blah blah.
The answer's out there for any alive people wanting to find that answer. (Sometimes I'm one of them!)
I've found stories I've been looking for for maybe 20 years.
And it was only 2015! We've got some unofficial "records" in comments here on some questions going back to 2005.
And a few on yet another forum I was able to answer, from about 2015 to 2018, the questioners did still see the answer. I was hoping they would, knowing how good the story was, how much I liked it as a favorite, how much they wanted to find it, how long it took me to find some stories, etc.
Sometimes they even mark it "Found", ha. Someone who asked a question in 2014 on two different forums that I answered recently said "That's it!!!" but either couldn't, or didn't, mark it as "Found" on either forum.