If a topic is of dozens of pages no one expects the newbie in it to read all the thread of discussion. But when we see that in the new topic the first page of posts is entirely of totally the same answers on the first post without anything new comparing with the first or the second answer post, it kills all the discussion.

It is so demotivating when you read main point of a discussion, read a couple of last pages (of 5-7-15-20-...) to know what in the direction of a discussion at the moment, come into it with your idea and then see many answers of the first post of the topic, totally ignoring all the discourse was before them. It kills a discussion in those topics. No sense in answering if nobody will ever answer you, if a significant part of the participants in a topic will answer only the first post again and again. Answering the first post on a third page has sense very very rare and nearly never it has any sense on the 4th page or further. And it never has any sense even on the first page if your answer is duplicating several the same before yours.