Comment by kazinator

Comments that are critical can contain useful information, like pointing out something that is wrong, and a potential solution or alternative or whatever.

There is no equivalent for comments that praise; they just convey "I like it". If there are too many positive comments, it can be annoying. Online culture has a pejorative for this: "circle jerk", referring to group masturbation.

(Praise can be accompanied by insight that is useful to other admirers of the work. I don't want to claim that praise is always "content free".)

While everyone likes positive comments and praise of their work, only the criticisms are actionable.

Note that a comment like:

"Wow, I really love the application and have used it daily for years. But it would be nice if it quit without are-you-sure prompting when the document has not been touched."

is actually two comments. "I like it" praise, plus a separate criticism that is actionable.

A comment like:

"I really like this track; the synthesizer part reminds me of <track by other, unrelated artist>."

says something beyond "I like it". It is actionable in a different way. People can look that up and compare.