I'll start. Did you know you can run a headless version of JD2 on a raspberry pi? It's not the greatest thing in the world, but sometimes its nice to throw a bunch of links in there and go to sleep.
Plex Debrid works with Jellyfin too. You just also need to setup Trakt for the watchlist. As you add movies and shows to Trakt watchlists, plex Debrid will grab them and add to real Debrid and then refresh your jellyfin library.
Plex is just a little better since you can use the plex discover feature to add items to your watchlist