I run it on a docker on my headless Linux server. I imagine a shield can run it but prob not a fire stick.

Fwiw, similar apps already exist for the Shield, Firestick, etc. Syncler & Stremio.

Yeah pretty much. With the extra advantage that everything is on real Debrid so don’t need vpn (if you normally use one or don’t have a seedbox) and using their storage you don’t need local hard drive space. Also a slight disadvantage right now since real Debrid is down for maintenance so I cannot access a majority of my content. This is very rare as real debrid usually has like a good 99% uptime. Usually’ll locally download my favorite shows or movies from Debrid so i can access it if there is an outage or a local internet outage.

With your setup there may not be many pros to switching to this setup. I had an identical setup to yours years ago but this time around decided to stick with real Debrid and plex Debrid.

Plex Debrid doesn't actually download the file to your computer, it just streams it. It tricks your OS into thinking it's locally stored, but it isn't.