This question already has an answer here:
Anyone who has been on SO for any length of time has come across answers by new users that should be a comment. In a lot of cases these answers become downvoted and serves to discourage the user as well as slows the users progress towards being able to leave proper comments.
Can we lower the bar for new users to leave comments? The current scale of 50 is achievable with a few good questions or answers, but for a lot of users, leaving a comment is a way to "test the waters" here and the continual downvoting of these types of answers only drives new users away, rather than educating them.