People write comments when they feel that they have useful contributions to make. It is much easier to notice that you have nothing worthwhile to say about a v

People write comments when they feel that they have useful contributions to make. It is much easier to notice that you have nothing worthwhile to say about a vectorizing compiler than about, say, the NSA. One way to get around this is to go meta, e.g. to discuss the commenting habits of others instead of the submission.