Earlier quoted context omitted.
> Theming was HUGE in Linux back in 2005-2010, consistency was paramount, adherence to toolkit was extremely important just like Apple claimed. it still is, just look at how neat things in https://reddit.com/r/unixporn/ look
But none of that was configured in one place, with every other program taking its lead from that central configuration. Instead, effort must be made to work through every program individually, customizing its color scheme.
that's definitely not my experience with KDE, I just have to set a theme on the system settings and 99% of apps take it (e.g. with this theme in my case: https://www.reddit.com/r/unixporn/comments/b49l7k/kde_sweet_...).