borari

It is part of the deep web, just like Discord or any sites hosted on private companies intranets. Lemmy is not, you can just hit any instance with a web browser and view stuff.

To be completely clear, dark web/net and deep web are two different things. That wiki link you used is describing dark web stuff like tor etc.

Yeah, Usenet servers all have a maximum retention time, usually around 3000 days or something like that. Any articles older than the retention time of your server won’t exist for you to grab, but stuff is usually reuploaded frequently. With torrents a super niche thing requires someone seeding the content all the time for it to be consistently accessible, while Usenet requires someone to reupload it once every 5-10 years (barring takedowns) which imo is more consistently stable, but as the other poster said having both ensures your bases are covered. I personally don’t really torrent anything beyond oddball bbc2+ documentaries at this point though.