Using my Webmention plugin, I can now send mentions from both posts and comments.
If I reply to a note of mine using a reply *post* (or note), it’ll send a mention to that note, and create a comment.
If I then reply to that comment using a reply *comment*, it’ll send a mention to the reply *post* (and create a comment *there*).
#Webmention inception.
The idea is obviously not to make things more complicated, but to allow to keep threads complete instead.