For me, Usenet isn't about availability; but speed, risk exposure, and convenience.

Torrents take longer, even with lots of quality seeds and fast network speeds; mostly because of the seeding process. Plus, while you are seeding: you have to publicly expose yourself as a content host, even if just through a VPN. Hosts are what copyright holders target, they don't GAF about the people downloading, they try to take down the hosts to stop the spread. Finally you have to keep the content you downloaded in the format you downloaded, at least until seeding is done.

I prefer to use Tdarr to automatically transcode downloaded content into h265 (HEVC) to reduce it's size. Most content is found in h264 (AVC); converting it, on average, reduces its size by ~30% while maintaining good quality. Overall this step has saved me at least ~7TB so far (Tdarr reports it's saved 4.8TB, but I converted a ton of stuff with Embys convert feature before implementing Tdarr). That conversion can only be done after seeding or the torrent breaks as the original files are no longer available to seed. Usenet removes the seeding step completely, so I can do whatever I want with the files as soon as they've downloaded, which in it self only takes 5min.