Playing devils advocate though, what are the advantages of NNTP?
(taking a few ideas from that SO link above)
One main advantage is that you can view offline. Depending where you are the stability of internet connectivity can still be an issue and being able to access an archive of information offline could be helpful. You still can’t interact though and that is a lot of the point of a discussion.
NNTP allowed you to have one login to view and post to as many newsgroups as you wanted. Web based forums are no where near as interconnected so you find yourself having a different login for each. Is this a concern? Personally no and things like OAuth2, twitter, google, whatever logins also reduce the friction.
NNTP/Usenet was supposed to distribute postings across servers right? Helps with making sure you don’t lose posts and things like that. Not sure how that worked for censoring post but it is a moot point when you are dealing with a private NNTP server anyway.
Any others? I wrote more but the I realised I was starting to list all the crap things about NNTP which was the opposite of what I said I would be doing