Libvirt is great, been using it at home to run VMs for ~10 years now.

Someone also ported it to the browser, just saw it on mastodon: https://wavacity.com/

I think what they were getting at is that you need to get the NZB files and archive passwords from a private community these days, many of which are closed/charge money for access. If you download group headers like you could back in the day, 95% of posts are encrypted - or else they get DMCA’d. also, most Usenet providers are under the same 2-3 companies, last time I checked - so DMCAs are a lot easier to serve. It’s definitely a lot less open than it was 10-15 years ago.