One distinct disadvantage of (replyto:…)
over (edit:#)
: (replyto:…)
relies on clients always processing the entire feed – otherwise they wouldn’t even notice when a twt gets updated. a) This is more expensive, b) you cannot edit twts once they get rotated into an archived feed, because there is nothing signalling clients that they have to re-fetch that archived feed.
I guess neither matters that much in practice. It’s still a disadvantage.