I’m always a little surprised to be reminded that Usenet still exists.
For access to the textual groups, you can use Eternal September (https://www.eternal-september.org/) or AIOE (https://news.aioe.org/) with a newsreader (https://en.wikipedia.org/wiki/List_of_Usenet_newsreaders) to see what discussions are continuing to happen.
There are still some people there, and talking about stuff. It's very much like hacker news, but with much less people :)
A big reason why Usenet is still alive and kicking is thanks to piracy. The same applies to IRC (XDCC), but probably to a lesser extent.
Mutually reinforcing cycles that led to the current state of Usenet as a seedy backwater where it was once an essential part of the Internet (and the UUCP network before it).