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Sometimes a comment, leads to the answer (or question) update. In such case the comment is not relevant anymore, since it addresses a resolved issue.

Are we supposed to delete comments like this? E.g. here:

  • The second point is not fully true. <...> – Iakov Davydov

  • <...> I update the bullet, thanks Iakov – Llopis

What about comments like: "Thanks, I updated my answer"? If the original comment was deleted, this looks strange.

In my opinion we should remove these comments, since they are not informative. What do you think?

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Yes, obsolete comments should be removed. Always. We even have a flag to clear out 'obsolete' comments that may have been missed.

Comments were included with every post for a purpose — to ask for clarifications or otherwise help improve the post. Comments are there to help facilitate the wiki-style editing in Stack Exchange that helps assure every top-voted answer contains the most complete, accurate, and current information available for that answer. Questions are improved in a similar manner.

But once comments serve that purpose, they should be removed.

We don't want to create a situation where, after every answer, the user has to pour through a series of addendums to see if the answer is actually complete… or is it the start of a meandering conversation where we swerve into the correct information at the bottom of page 18. That was one of the failures of threaded discussion forums which prompted the creation of Stack Exchange.

Once comments have served their purpose, they should be removed; otherwise, it's not clear whether the vetted answer is actually the complete answer or not.

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  • $\begingroup$ I'm not sure people are flagging obsolete comments. As an example, a question I recently wrote is littered with obsolete comments... $\endgroup$ – winni2k Jun 22 '17 at 15:30
  • $\begingroup$ Or maybe my understanding of obsolete is just wrong... $\endgroup$ – winni2k Jun 22 '17 at 15:30

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