[dang]

I know it's annoying when we moderate HN this way and the project happens to be one that you care about, but it will make more sense if you realize that (a) we have to moderate for the general case—i.e. if we didn't have this rule of thumb, the front page would fill up with release announcements of popular projects, of which there are many every day; and (b) the issue with duplication isn't really about the article/announcements—it's about the resulting HN discussions.

That is, it's not primarily about the diff between announcement N and announcement N+1. It's about the diff between HN thread N and thread N+1. Comments in these threads are almost invariably generically about the project as a whole. You can see that with e.g. https://news.ycombinator.com/item?id=31764384 in the current thread - which is a fine comment in its own right. There's nothing wrong with these threads! The only problem is that we have to regulate how much repetition of them there is.