You raise a good point, but an email on a mailing list lets you reply to specific sentences/paragraphs. I guess the fairly unique value that twitter is adding h

You raise a good point, but an email on a mailing list lets you reply to specific sentences/paragraphs. I guess the fairly unique value that twitter is adding here is going from the specific paragraph to see if there are any replies. Maybe webmention needs the ability to reference parts of a page, although I guess you could do that by linking to an anchor.