It has been at least five years as far as I know, since it was possible for someone to post as "guest" - and even then I suspect it was only due to some glitch in the way the forum was run at that time.
Therefore anyone posting as "guest" has not been participating in the forum for a long time as they would necessarily have had to create a persona - as hewi did just four years ago and has just come out of hibernation seven weeks ago. :grinning:
The only argument for "reviving" a post after the Original Poster (and even some participants) is no longer a participant and will not be notified of any updates to the discussion (because that can only happen if you created an account) is to assert that new information is being provided that others may find useful if their search lands on this particular thread.
And that is in itself plausible. I have done it from time to time, though generally in a thread where I had already been a participant. It automatically implies that the person adding to the thread has themselves been searching for the same subject matter as in this example.
Unfortunately, it is of limited benefit as people often find searching unsuccessful or too tedious if the thread has become very long and extends over many "pages" (which are by default, inappropriately short at 14 "answers" per page - best configured to the maximum available, presently 50 per page and of course you have to set up an account to configure this) so a lot of the time - we cannot know exactly how much - they simply post a new question detailing their exact situation which is mostly quite acceptable.
Of course, if their problem is only a minor variation on an older discussion and the discussion thread is not ridiculously long, then adding to that that is OK as well. :sunglasses: