It's about What are the advantages of forgetting?
I just do not see any benefit of close voting a question that
- received an accepted answer 5 days before question closure;
- was well received by the community at large (6k views, 22 upvotes);
- received 4 answers;
- accepted answer is well referenced, well upvoted and not downvoted once.
Of course, the question stats are positive because it became hot, but in general I do not see the benefits of closing a question when established users have answered it and where the answer apparently makes sense.
I personally often remove close votes when the answer(s) make up for a mediocre question. The art of answering is writing interesting stuff and I am of the opinion that answers can make the question.