Finally I can say "I knew that before that PSA"
Specifically 4k 144hz HDR screens are a SCAM, they are neither HDR10 nor are they 4K (at 144hz) and the way 8bit panels are frequency averaged to 10bit is also scummy to the extreme.
It just boggles the mind that screen makers ship screens with those limitations fully knowing that what they sell CAN NOT function, the new standard for HDMI and DP is still miles away. Yes, the 1180 will use a new proprietary port, but these 4k 144hz monitors sold now don't support that and neither does any other monitor.......
It's good to finally have it said in clear what chroma subsampling actually does though, that is quite confusing otherwise.