The conversion is not the biggest issue. For my dad or Grandmother to stream my content, Plex as a streaming app is something they can easily understand and digest (though Plex's new streaming app has done quite a bit to undo that -_-). I have the subscription, I acquire the content, I choose who to share it with. Now they need a subscription, too? Where's the value? Why wouldn't they just pay for a streaming service at that point? I'm using my hardware and doing all the work and they are paying Plex? And if I accepted payment for the same thing it would be a crime! BUT I'm not sure I'm comfortable opening Jellyfin to the internet, even behind nginx, and I don't want to have to spend time setting things up for them or troubleshooting their issues w/ Jellyfin. I put enough labor into this thing already.
So yes obviously everyone should switch to the FOSS option, but in reality it's not that simple because the services aren't 1:1.
That is what I thought, until this article. I'd be pleased to find out I misinterpreted.