I got a Synology NAS for my children’s photos and wanted my music to be available in our LAN as well. Jellyfin looked good and is open source so I gave it a try. I am very happy with Finamp as a mobile app to play and sync my library.
No, I've just been trying it out recently. I switched from Tailscale with a self-hosted Headscale server, because I prefer the open-source aspect of NetBird.