The canonical example are the Quote Toot/Quote Post wars.
I am in favor of them, because I often want to share something WITH context for why I'm sharing (the proverbial "retweets are not endorsements"). Or I have a comment or joke I want to publish to my followers but that only makes sense because it builds on the original.
I said that once here and was told, "Why don't you just reply to the original and then boost your reply? That's what I do."
To which I pointed out that even if I also boosted the original, there was no guarantee anyone would see both of them (or see them close enough to each other to make sense). My debate partner said, "Well, if somebody wants the context, they can just click on my post and scroll up."
Which is nonsense. He was saying, "Well, it works for me," but it was actually a thinly-disguised, "Well, I don't care about that and you shouldn't either." He either didn't understand or simply dismissed the problem statement.