[krapp]

>Technically, posts that have replies can't be deleted, so what sometimes happens is the poster edits their post and replaces all the text with "[deleted]".

Which should also be prohibited, because it's just as destructive. You shouldn't be able to edit a post with replies either.

[Wowfunhappy]

I don't know, if my posts were locked after the first reply, my contributions to HN would be definitively worse. I almost always find confusing typos and grammar errors, and things that just could have been stated better, after initially posting a comment, and I use edits to fix those problems.

Yes, ideally I would just do more revising before posting a comment the first time, but I don't seem to work that way.

I think the two-hour window is a good compromise, and if anything I really wish it was longer. Yes it has downsides, but I really think they're outweighed by the good.