You can see that apple is really dismissing everyone with Local iTunes libraries. Our days are numbered I have like 20TB worth of media I might have to make the jump to Plex
You nailed it. I have about 18TBs I keep on a dedicated Mac Mini as a media server and Catalina is so bad with my personal content, I rolled back to Mojave and just held there until this week. I get that Apple wants to see content through their store, but their treatment on my library has been so dismissive.
That said, I started with Plex about 2 years ago and run Plex and Apple iTunes/AppleTV concurrently. Plex is AMAZING with your own content. The only issue I have is it uses the web more than I's like (its server interface is essentially a website even thought he viewer and server itself are local apps).Also, Plex has the ability for me to view my content remotely, which I love, but brings in other bandwidth issues. Still, it is awesome.