It happens fairly frequently that some one with very few reputation points posts an "answer" to a question that the community feels was more suited to being a "comment". Some one then starts an action to delete this answer on the ground it it isn't an answer because it's a comment.
Rather than just deleting these posts, which sometimes contain useful information, wouldn't it be better if there was an option to convert an answer into a comment (of the main post, by default)? Or alternatively, allow users with insufficient reputation point to post comments that have to first approved in the same way that edits need approval before they are posted.
this is rather a comment than an answer
is not really helpful for <50 rep users, as those cannot post comments, however, the 50 rep boundary is nevertheless useful, as it prevents spam comments (at least I have not found encountered one the whole time being at TeX.SX!)