Neither do I - I use either my phone, or my smart TV, or my fire stick. SSO works fine there, or you can use the QR based session transfer to SSO on your phone and then “sign in on another device” or whatever by scanning the QR your other device is showing. I think they call it quick connect or something.

It does what you want.

And if you think Grandma can’t figure out scanning a QR code, Grandma is also not gonna figure out MFA lol.

You can run the OIDC version and use SSO and implement MFA on the IdP. I use Keycloak for SSO w/ MFA and users sign into my Jellyfin via Keycloak. Just disable username/password auth and leave it SSO only.

The only benefit Plex really has is the relaying, but I was able to sync watch with 3 people basically as far across North America as you can get from me and it worked without issue so…

I’m running a Matrix server with a FB Messenger bridge via mautrix-meta and that makes it a clear winner. Half my group chats have migrated entirely since I’ve set my close friends up with accounts in my server and they also use the bridge. The fact that people can slowly migrate chats without losing messages or groups is killer for adoption imo.