Let's talk about this clause in the help:artist commentary wiki:
Note that adding commentary does no harm, whether it is useful or not. Commentary can easily be removed if determined to not be of much worth. Leaving out commentary risks it being lost in the future. The commentaries of works with bad id or bad twitter id for example, if not included during the upload process, cannot be found after.
This is kind of open to speculation as to what commentary can be removed without disagreement from other users. After all, there are a handful of users that will add commentary that may at times seem completely trivial and unnecessary.
Why I bring this up now is because it was brought up on this post, where two separate users added in the work title: one where it wasn't present to begin with, and another after a user removed it. PM'ing the user who removed it resulted in this exchange:
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I'm against polluting the commentary tag with trivial "commentary." That tag is to highlight posts with extra information, such as the artist's mood/jokes/intention when they were drawing a picture. Even a "I want to date Kanna" would be more acceptable as a commentary than "adult Kanna" on an adult Kanna picture.
Are you going to "translate" every "commentary" that spell out the character's name too? Any pixiv or tweet with "Reimu" or "Kobayashi"?
What you think is trivial isn't to others, considering it was re-added after you removed it and then retagged with commentary request. Even "adult Kanna" may not be trivial, as much as you think it may be so.
So this is really a proposal to elaborate on the stance where commentary belongs or doesn't belong.
I believe that that no matter how trivial the amount that commentary adds to the picture, it should be added anyway. It's less confusing for many other users in this regard. Besides, if we really needed, then there's always a way we can organize more detailed and insightful commentary through pools and the like. Relegating it to the likes of just "artist's mood/jokes/intention" is just plain narrow-minded in my opinion. Even commentary that spells out the character's name is useful, such as in the case of Twitter where you can't always tell for certain who the character is without the tip.