It's because comments like "wow that's cool" are discouraged here. If someone doesn't have anything to contribute to a conversation, they'll just leave an upvote. Apparently 65 people thought "wow that's cool" but didn't have anything to add.
very true and every site is different w/ regard to how the community responds/handles link discussion but it does seem that sometimes discussion doesn't seem to be "a thing" for certain links.
Is there a clever name for this phenomenon yet? If not...anybody want to attempt to give it one? 'Cause I got nothin'.