I could talk about plex and usenet and that type of **** all day long, man. DM me any questions, it's one of my favorite topics.
I'm switching from Plex to Emby soon, but honestly I'm not sure anything will ever beat having all of my favorite TV shows and movies and Patriots games and MST3K and tasteful art provided by various female performers at my finger tips without being at the mercy of streaming providers, etc.
Again, for me it's about convenience not cost savings. If Netflix et al didn't cycle through shows and had them available in perpetuity I'd happily pay the monthly fee.
For instance right now I'm using a combo of sickbeard and sabnzbd to automatically search and find my favorite shows, grab them, and move them to my plex library so I don't have to go looking for them.