http://www.eternal-september.org/postingstats.php
The top 5 newsgroups for May 2023:
it.politica, fr.misc.actualite.covid19, alt.fan.rush-limbaugh, it.hobby.fai-da-te, uk.d-i-y
I'm not sure what to make of that (aside from the large Italian/French contingent) but the top 10 includes some normal fare like rec.food.cooking, rec.arts.tv, and rec.bicycles.tech
The pull model (consume based on your topic/activity) of USENET newsgroups fits forum discussions much better than the "visit all pages you care about daily" Web model, IMHO.
Technically USENET doesn't have that concept either, but all the software I have ever used to read it does, and that is what counts. (unfortunately all the software is local only so I can't switch between my phone and my desktop for reading - then again I haven't looked at USENET in 25 years so I don't know what is current)
Shouldn't be too crazy to cobble together, if it doesn't already exist -- just an nntp client on top of a lamp stack.
https://github.com/HackerNews/API
https://www.npmjs.com/package/hackernews2nntp
https://github.com/gromnitsky/hackernews2nntp
Honorable mention for gwene.org which converts RSS feeds into NNTP and gmane.org that converts mailing lists into NNTP.
Private nntp servers never seemed to be a thing though.
Compare this to Reddit however you like.
Nearly dead, but if you post cogently, someone will respond: rec.audio.high-end -- discussion of high-quality (not necessarily high cost) audio reproduction
alt.arts.poetry.comments
alt.bbs.synchronet
alt.comp.software.firefox
alt.fan.usenet
alt.folklore.computers
alt.os.linux.debian
alt.pub.coffeehouse.amethyst (This is somewhat low-traffic but is unique; people write in the third person imagining themselves stepping into a friendly coffeehouse)
comp.infosystems.gopher
comp.os.linux.misc
comp.os.linux.networking
comp.risks (moderated)
comp.sys.raspberry-pi
comp.unix.shell
gnu.emacs.help
rec.food.cooking (eh, 60% flames, 40% interesting)
rec.music.classical.recordings (surprisingly active)
LOL. I guess I shouldn't be surprised at the overlap in interests. You like one old fossil of a communication system you will probably like more.
rec.arts.int-fiction
rec.games.int-fiction
rec.games.roguelike.nethack
Some of those troll fights were fun. Some even involved poetry.
Also: obligatory link to the Usenet Poetry Groups "Rogues Gallery" that I created prior to the Great Poet Flight: http://www.rikweb.co.uk/photos/rogues-gallery.html
I caught only glimpses of some of the stuff he had to witness, and I would not wish that job on my worst enemy.
I really wish it wasn't and that new standards would be on top and clear it up.