I had a similarly negative experience, sadly. Samsung managed to break HDMI-CEC in the final firmware update for one of their tvs, and wouldn't allow downgradin

I had a similarly negative experience, sadly. Samsung managed to break HDMI-CEC in the final firmware update for one of their tvs, and wouldn't allow downgrading. Which tends not to be great for a tv one wants to use with a Chromecast or similar media box...