It’s simpler to get onto good indexers for german media on usenet than it is to find a private tracker and get into it.
Also, my upload is slow so I’d have to use a seedbox to torrent on private trackers instead of using my homeserver.
I like P2P filesharing more than usenet since it’s decentralized. Most usenet providers with long retention are owned by only a few parent companies which is never good in the long term. As long as private VPN’s are allowed torrenting can’t be stopped.
On usenet with my indexer I find dual language 1080p remuxes for most movies, so I’d say the quality is as good as it can be. But this is probably also the case with a good private tracker.
If your already on private trackers that have all the media you want I really don’t see any advantage to usenet.
As for tools, it’s mostly the same as with torrenting. The arr* stack supports usenet, it just downloads with sabnzbd instead of qbittorrent (or your preferred client).