The two-hour edit window and rapid falloff on HN are two of my least-favorite aspects of discussion on this site. It is almost a daily occurence I'll come across something interesting here, get ready to type a contribution to the conversation, then realize that it's too late, and it won't be read. It is a little demoralizing.

I'm sure this approach also eases the moderation burden, and I'm pretty impressed overall with how dang handles things. So maybe it is a simple workload necessity. It does strike me that HN could be quite a bit more if these two restrictions were loosed.