The article is a bit out of date. I would recommend adding Prowlarr to the mix and dropping jackett.
What’s the difference between the two? I’ve been using jackett about a decade with no issues
Prowlarr works a bit differently, it auto configures each indexer on sonarr and radarr and will automatically remove them if they go down and things like that.
With jackett, you’re not really supposed to use the “all” endpoint and if you want to do it properly you still need to configure each indexer on radarr and sonarr.
The net result is its much faster and more efficient, especially when you add more than a couple of indexers.
Usenet is so much better than torrents, highly recommend checking that out
If you’re mentioning privacy, I’d also include a VPN as part of the stack.