Ok fair enough. Admittedly I haven't spend too much time with this yet. So you set it dark enough and then the ABL just won't even get triggered or activated at all ? I am not all hung up on peak brightness at all either.You understand that's impossible, right? The whole TV would probably catch on fire if you turned ABL off and then sent it a signal that it should display a full white screen at 800 nits. Assuming you didn't immediately blow the power supply, which you would.
C9 ABL is @ 151 nits full screen white, 317 for 50%, the CX might be improved a little bit but it will probably have the same limitations. It's unrealistic to expect otherwise, and it doesn't prevent desktop use at all. Use dark modes, they look better anyways.