XDR Brightness is one of those things you can't go back to not having it.

I love working in botanic gardens and on the porch when I'm in the countryside, and XDR Brightness has made this experience much more enjoyable.

It may sound counterintuitive but I usually turn on Dark Mode when enabling XDR, because:

    - I mostly work with text which gets a ton of contrast at 1600 nits
    - the screen doesn't get hot as most of it has dark pixels
    - the battery lasts longer because energy is not wasted on bright white backgrounds

Lunar's contrast enhancer is what allows this XDR in Dark Mode thingie to be useful: https://files.lunar.fyi/enhance-contrast-slider.png