This article talks about Google Groups in the present tense, even though its Usenet hosting permanently ceased around 8 years ago.
https://groups.google.com/g/de.soc.recht.steuern+buchfuehrun... https://groups.google.com/g/de.soc.recht.misc
(The second group even has some recent spam in it, which is rare nowadays.)
That's the rising again part.
I know tons and tons of nerds with extreme technical hobbies. None of them have ever talked to me about still using Usenet. The only place I hear about it is for Seedbox stuff.
The crux of the article is that the Big-8 board has reconvened and is active again; I spent a paragraph or two on that. That's what is back, and that is what the headline is about.
Google Groups is still current and comparing a couple of groups to my Eternal September feeds, they are in sync, so I call [[citation needed]] on that. If you can't back it up, I think it's disinformation you've picked up somewhere.