So, now if you reply to my posts, the discussion will be easier to follow, since the post I'm replying to is shown above my reply. Isn't it awesome?
Note that reply contexts are archived. If you change your reply, there's no way for me to know that you changed it and update the reply context automatically!
heh, I have posts denormalized in my database (so, always referenced by URL) — after receiving an update webmention for a post, the updated version shows up in all reply contexts.
(at the cost of some complex and not-very-fast PL/pgSQL procedures :D)