Certain ones, like music trackers, can still be interviewed into. Once you get into an initial tracker and establish yourself, it becomes easier to find / get into new ones via forum invites. It’s a long road but barring a time machine it’s the easiest way.

I dunno, maybe I just had crappy indexers but usenet was always more miss than hit for me. Maybe it’s superior to public torrents but private trackers are the gold standard.