Samsung TVs have a Plex app, but not a Jellyfin one. Lots of people have Samsung TVs. I mean lots. Other modern TVs are likely the same, like Onn (at least the Roku TVs) last time I checked, and again they are all over. The ease-of-use factor really is a huge win for Plex.

Edit: Yes, Samsung Tizen models can try and sideload an app, but that’s not something the vast majority of people are ever going to even think about, let alone figure out how to accomplish.

Edit 2: Well shiver me timbers, Jellyfin’s on those Onn TV’s. TIL.