Earlier quoted context omitted.
"Dark mode" is needed in dark rooms, since screens don't autoadjust their backlight based on the room's white point. The concept of "white point" is often spoken of in terms of color, but brightness very much does matter too. It is painful for there to be something (especially something large) brighter than "white". ** That said, we should have automatic dark mode based in inverting HSL's "lightness" (this can trivia…
> screens don't autoadjust their backlight CRT monitors had easy dials to quickly adjust brightness and contrast. You almost did it automatically without thinking when you had developed the motor memory. Nowadays monitor controls are often fiddly and awkward. But I still use them to adjust brightness to the environment.
Non-exhaustive list:
Linux: https://github.com/ddccontrol/ddccontrol || https://github.com/rockowitz/ddcutil