Not sure what the point of re-doing questions would be. Old questions automatically reappear whenever someone adds/edit anything and anyone can add their own answer to any existing question.

The question tags, when used properly, group related questions together by subject area anyway.

Having duplicate questions spreads related answers around and makes them difficult to find. See the comments to Should we edit and revise old questions and answers?

This is not the same question as in the link that says it may be a duplicate. The other question asks if we should change or revise our answers after they have been posted, but we change our perspective or have more information. The other question addresses the fact that a best answer may have been chosen already. If someone changes their best ansnwer, it may be unchecked because the asker no longer likes the new answer. So this is not a duplicate. And in many cases, neither are some of the questions that have been closed because they are a duplicate.

Now to answer this question, I think that if someone thinks a question may be a duplicate, they should post the link to the possible duplicate so that everybody who is interested can see the other question and answers, leaving the new question open for new answers. I think it is very limiting to close questions because somebody thinks there is a similarity to another question because 1. We don't all see the old questions to give our answer unless we search for it. It's not in the list of new questions for all to answer. 2. As in the case of this question, the person who thinks they are the same could be wrong and we could all miss out on some good answers, just because the question is different a little bit, or a lot. 3. Many of the older answers have a best answer chosen already, which discourages new answers. 4. Sometimes we have new answers, but don't want to go back and change our other answers for various reasons.

So, I think that a link should be placed in the question so that everybody can see the other questiona and answers, but leave the new question open for new answers. I understand that related questions pop up when you go to ask the question, but if you don't like any of the answers and the question is old, we might get new answers since there are new people all the time. I have found that some of the questions I had were already asked, but they were old, I wasn't satisfied with any of the answers and a best answer was chosen. Asking again would have gotten new answers from new people, but if it is going to be closed, then why bother?