I hate Plex. It's gotten too bloated.
I run Emby primarily, but not externally accessible [vpn]. It works really well for me, haven't had any issues.
I use Jellyfin to put some stuff for the toddlers. It works on Amazon Fire Kids, while Emby doesn't. It works ok, but it's definitely less polished than Emby, and I feel like it's not as stable. Could just be me though.
Wow. My homeserver drives generally last me 5-8 years before I replace them. Can't imagine getting nag dialogs after 3...
With mirrored storage spaces / raid10, who really cares if a single drive dies?