low quality posts

You're being charitable, imo. USENET was plagued by a seemingly never-ending parade of mentally ill savants who lived to post, lived to troll and lived to avoid killfiles. It made it deeply unpleasant.

I see in the AMA they're discussing moderated newsgroups, I never saw any in my day but frankly, moderation is often worse. Reddit had, I think, the most workable idea of them all, community policing and hiding content beneath a threshold. The unfortunate corporate reality of Reddit begat Lemmy and here we are now.

With Lemmy and the Fediverse, I don't see USENET as being in any way relevant, other than its continuing role as a solid resource for above-average pirates. I don't miss it even a little bit, it was utter rubbish by the end.