They’re probably talking about Samsung TVs, not their android phones/tablets. Installing jellyfin on those things can be a chore. My experience with LG was similar. The official build was out of date and riddled with issues that didn’t exist on other versions. It refused to play videos that worked well enough on other devices, transcode or no.
I use Linux myself, but my work laptop they gave me is windows. I can honestly say that I believe in near future the average Linux experience is going to be smoother than windows. Because I cannot believe how insanely annoying windows 11 is. It’s really not good. And modern Linux has more than good enough software and hardware compatibility.
But of course it’s gonna take a long while before Linux overtakes windows because social inertia. And that’s not gonna change easily because there is no humongous international corporation that spends billions every year to get their Linux based OS pre-installed on almost every new computer.