This is a question that I started thinking about when I got a comment about this answer I posted:
The question is well framed, and is almost a "yes/no" question. The OP asked "is my solution correct, and if so, why is it strange", and his solution was actually correct (if a bit confusing). Therefore, I answered by basically explaining that "yes, the answer is correct, and this is one possible reason for the strangeness of the answer"
The result? My answer received a downvote and a comment "But the question seems to be easily answered in comments" which seems strange to me.
My logic is that answers are answers, and comments are comments. I see no reason why an answer deserves a downvote just because it's short.
That said, I might be wrong. I don't mind taking a downvote, it's every user's decision about how to vote. However, there is also a more etherial concept of "community" at play here, and I want to know what the community overall thinks about comment-length answers. Are they really inappropriate?