Those with LG OLEDs might find this post interesting. I was reading through the
Spears & Munsil UHD HDR Benchmark Disc - Discussion thread at AVS Forum and Stacey Spears was explaining how the LG's PC mode works. He owns an LG OLED and claims PC mode processes the image at 8-bits. That might explain why only 8-bits doesn't exhibit banding on LG OLEDs:
https://www.avsforum.com/forum/139-d...l#post58289648