Certainly there's a mess to clean up due to more stringent standards on the site now than when it was new.
Retrofitting old questions to new standards clearly creates problems of its own due to answers that were based on the earlier form of the question.
Over on the Judaism StackExchange, I edited a question I had asked when an answer pointed out a major error in my question. But since it had already been answered in its original form, and that answer had already received an upvote, a mod there reverted it. You can see the question, answers, and comment trains here, and the mod's comment about reverting my edit here. So it appears that editing questions into a form that makes previous, already upvoted answers obsolete is something of a no-no on StackExchange.
However, the "humans becoming angels" issue is clearly a burning question for many people. There are various permutations of it here, some closed, some still open. So it would be unfortunate for it not to be represented here, and open for answers.
Speaking for myself, I put considerable effort into the answer I posted to that question. Most of the Bible references came from the linked article, but I wrote new text, fixed some references, and changed some references to ones that I thought were better. The reason I did all that is that I did not find any of the previous answers satisfactory--and I am perhaps in a unique position to provide the Biblical basis on this subject because it is my church and "our" theologian that popularized the idea over two centuries ago, so we have ready answers to that question.
Given all that, if this question were closed, I would feel the need to create a new question that meets current standards, and re-post my answer.
However, it does seem unfortunate that the site is littered with closed questions, some of which are very popular and draw many hits. In fact, the queries posted here show that the top two hit-getters by far are both closed questions. And the question under consideration for closing here has over 20k hits, putting it in the top 100.
I realize I'm a newcomers here. It's not my job to tell you guys what to do. However, I hope there is a way to make sure that some of the most popular and sought-after Q&As don't end out getting closed and orphaned for any new answers when the only real problem is that they weren't asked in the correct form for this site.