Just noticed a feature, I think it is new and this is how it works.
When listing posts and uniquely if the poster is the originator of the thread, all pages in the 'last 3' page index containing a post by the poster are shown as links.
I've found a glitch when replying in both forum posts and conversations.
If a link to a post is inserted and the default unfurl allowed the first post on the relevant page is unfurled instead of the linked post.
Inserting a link is better than quoting a post number because post numbers are not fixed, when a post is moved the numbers of any posts below it are decreased by one.