I wanted to understand more about higher precision color representation (bit-depth). IMO shift from 8 bits to 16 is long overdue, we use 8bit since VGA and now use many times more pixels but same quality of a pixel. As now 10bit monitors/tv become available and (hopefully) more bits too, I did a web search and had not find much. E.g. Can I use 10bit effectively today and if yes how? (from 2017) says:
If you decide to upgrade, special video cards and drivers are needed to use more than 8-bit color. That pretty much guarantees hours of fiddling to try to get everything working. Outcomes include thinking it's working when it's not, but being unable to tell the difference. Or simply giving up and settling for 8-bits. If you ever do manage to get it working, people will continue to send you JPEGs even though you've insisted they send only HEIC or BPG (or PNG or WebP or EXR). They will also complain about not being able to open your files or about the colors in your images being "off" because they weren't considerate enough to also upgrade their equipment to display 10-bit color. (Or perhaps worse, they will compliment you on how warm the colors in your images are when you had intended cool tones...)
The question is about bold part. I was surprised, isn't 10bits HEIC vs 8 bits is just 2 extra bits to add more precision to color intensity and to display 10bits on 8bits hardware one just drops 2 bits? How such drop can change "warmness"?