This post What should I consider for a one month language program? was recently edited, after four years of inactivity.
While the edit itself is sensible (some unneeded tags were removed), it bumps the post up into the "Active" questions.
In this case the question is clearly off-topic. I believe it's not in our best interest to give prominence to such questions, via edits.
While the post activity has some benefits, as it prompts much needed close-votes, and it shows new users what kind of questions are likely to get downvoted, it has the side effect of cluttering the home page with off-topic content.
And there is always the risk that someone goes in and comments/answers, albeit in good faith, while we can't reach the 5 close votes threshold. As just happened here.
Should we defer curation work on these questions until after they get actually closed for good? (Flagging to bring it to other reviewers' attention might be appropriate)
Disclaimer: I'm not pointing fingers. I might have been guilty of this myself in the past. However today I've come across such a case, and I thought it's worth a discussion on meta.