Also, repeating comments on the same post. Obviously you don’t have to read all the comments if there are already hundreds of them. But if there are too many comments saying the exact same thing it just gets harder to read them all. So it would be nice if people would look whether the point they want to make maybe has been made already. They can increase that comment’s visibility by upvoting. No need to make other people read the same content multiple times and by that make it harder to read different comments.

This may be a little bit of an issue here as small instances (or frequently defederated instances) may not be aware of replies made on older comments. To see the whole reply chain of a comment you need to click the fediverse button (the rainbow star thingy on Lemmy web) and read the source. If people don’t do that they may legitimately not know that someone has replied with the exact thing they were about to reply with.