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.
Another option is to add tdarr to your *arr stack and have it automatically convert any problematic audio/video streams into ones your devices can handle.
I have it set to encode truehd(?) audio since none of my devices support it and it also ensures there's a video stream that my roku device can play since it's a bit pickier than my smart tv