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xkcd #3245: Results Age
(imgs.xkcd.com)
Title text:
Please, we need your help. Our research suggests you're the last living descendant of the person who knew how to format this config file.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3245/
Worse than only finding old posts about the issue is when you find an old post, then notice that it's got your name as the author, and you realise you've been fighting the issue for so long you've forgotten where you posted about it.
And there's a comment below by you
"Fixed it"
And nothing else
Or when the person with the answer deleted their account and all messages with it, then all of the comments after say “That worked!”