Go back and read the original posters comment. He is not talking about ABL he is referencing ASBL. And Sony does still have the most aggressive ASBL dimming in 2017-2019 models compared to other brands especially in HDR.Incorrect. The 2020 LGs have more aggressive ABL than any other OLED on the market. Sony has laxed their ABL since late 2019.
I haven't seen the 2020 Sony or LG so I can't speak on how they have changed or remained the same for this year.