Look @ this post:
https://www.techpowerup.com/forums/...processors-mitigation-out.246795/post-3886856
I posted once. Several hours after (more then 6, IIRC), i posted again but both posts got auto-merged: you can see where i edited it, to clearly separate them (i had reported this post because of it but that did no effect).
With something to clearly differentiate the posts, no editing would be needed. As can be seen from this specific post, both replies cover different things, which is why i didn't edit that post and posted another to begin with.
That worked well ... not ... because it got auto-merged and, when that happens (AFAIK), no "new post" alert is given, which means that when other posts do get posted, when users go check the newer posts they might just miss the merged post because of it, since it's "not new" and, as such, assumed to have been read before, when it has infact (@ least partially) not.