The original comment was that redshift was needed outside of Gnome or KDE, so I think the comment you're responding to is addressing that. It still seems like a legitimate gripe that it doesn't work for many other compositors, but I think the inclusion of KDE/Gnome here is a bit of an accidental goal post shift for the parent comment.
Yeah, I didn't bother with the proper names for these. I needed something to make my display color warmer, control brightness, a proper lock / login screen, sanely configurable task bar.
These exist, but while they are first class citizens on AUR (which is really just building from source), they are mostly absent from the ubuntu repos. You wind up chasing down and compiling nine different dependencies for a fecking backlighting program before realizing you just don't care anymore and you happily switch back to i3wm on xorg and move on with your life.
> The original comment was that redshift was needed outside of Gnome or KDE,
but even if you use gnome or kde you can still use redshift in X11 because these things are independent. e.g. maybe you have a redshift config file associated with a screen / location, it shouldn't matter which DE you are using for it.