Strengths: Totally de-centralised - your post on your local NNTP server, and it gets replicated across the NNTP mesh to all the other servers. Built in thread

Strengths: Totally de-centralised - your post on your local NNTP server, and it gets replicated across the NNTP mesh to all the other servers. Built in threading... Actually HN is very similar to how a fairly busy newsgroup would look back in the day. Weaknesses: Posts used to take hours (sometimes days) to replicate across the whole mesh. Not so much nowadays tho. Text only; no native support for rich media or Unicode (although some might see that as a Strength)