Eh, I've found it useful on other boards because I can scroll up the whole page at once to reread the posts above instead of having to scroll first the reply page and then the vertically-constrained box of previous posts, and pictures on the page will be intact. However, it also makes it somewhat more likely that someone will post without seeing the last page of the thread, while the usual reply will show the last posts in the thread rather than simply what's onscreen during the reply.
Edit: I think everywhere I've posted, which is very few places, I've only seen the post I'm editing on the edit post screen.
Edit: I think everywhere I've posted, which is very few places, I've only seen the post I'm editing on the edit post screen.