Jellyfin is notoriously full of security holes. It's recommended to not expose it to the Internet. It's also easy easier on Plex, at least until this bullshit, to have a random non-techie family member sign in to your Plex server from anywhere. I never liked Plex and never got into it, but I see why people used to prefer it.

I think Emby is a good middle ground for people looking to jump ship from Plex. But I switched to jellyfin from my lifetime Emby sub because the plug-in community there feels dead and Emby development felt dead in the water.