I used Plex for a long time and was very tempted by their lifetime plan. I tried Jellyfin but at the time it just wasn’t a patch on Plex. I continued with Plex but always had that itch to get away from closed source. I eventually tried Jellyfin again and whilst it’s definitely not as feature rich as Plex, it does what I need from it which is a central store of media that any TV in my house can use. I’ve even given a few friends a login so they can watch content.
I do love that it’s completely self hosted. I run it behind Caddy so it has a Let’s Encrypt certificate. All run in a Docker container with the media from an NFS share from a Pi4 with an external HDD.
That said, I still have Plex running as I have one Samsung TV and there’s no official Jellyfin client for it. Yes there’s some long winded developer way to get one on but I just can’t be bothered.
All my media is shared from a Raspberry Pi 4 with a HDD attached to it via NFS. Jellyfin runs as a container on a cheap Chinese mini pc I got off AliExpress. I’ve not had any issues over the network. It even transcodes on a share of the Pi as my SSD that has Jellyfin on is too small for larger movies.