I'd prefer to be exclusively on Jellyfin. It simply has more features that I use - specifically, collections are great non-hierarchical groupings.

But periodically my system will refuse to see the Tailscale server, and I'll have to do some black magic tech operation like reinstalling to get it back.

Additionally, guiding a friend remotely through installing both Jellyfin and Tailscale is far more effort than saying, "Find Plex in your media sources."