Is this too much of a a pie in the sky dream?
It’s for BBPress to detect prior to a reply being posted, that the posted reply will hit the current forum post per page limit. That is, after posting the reply, it becomes the top post in a new page of the topic. The most practical method is for BBPress to automatically insert a quote of the previous post, based on the assumption that most of the time, the current post is responding to the reply last posted.
The benefits are reduced clicks on previous pages of a topic, promising miniscule savings in data transfer and bandwidth. 😛