<p>As long as no answer was provided to the question (but see also <a href="https://meta.stackexchange.com/q/25088/150510">How can I delete my post on Stack Overflow?</a>), I think there's no real problem if the OP deletes his question and asks a new one; and it is not forbidden to delete one's question. However, no cross-reference can be made with the initial post, and comments will be lost for others (at least users <a href="https://meta.stackexchange.com/q/109329/150510">below 10k rep</a> won't see them). If the comments thread has demonstrated that the question, as originally posed, was really off the mark, then it is probably good to start a fresh question, and maybe summarize the main points raised in those comments.</p>

<p>It also possible to simply update the question in case there were some missing piece of information, or actual comments suggested the original question should undergo major revision. This way, we can always refer to comments and post revisions.</p>

<p>So the question is really about recording a trace of comments, and I don't think they are worth to be kept if the question turns out to be completely different in light of them.</p>

<p>(I think you were of good advice by suggesting to start a new thread there.)</p>
