It takes me at least 3 times as long to find what I need with these minimalist monochrome icons, though. I always opt to the more colorful ones, if possible.
Can't you just right click an icon, set it to whatever you want (including the original one), and then lock it so subsequent theme changes won't change it? DE people are moving in all the wrong directions :/
The submission title makes it a bigger deal than it is, the article clarifies that "The team reasoned that overriding another developer's branding is rude, and it also lacks the resources to maintain the icons as branding changes over time." and "Anyone who misses the old look is welcome to create a new icon theme and upload it to the KDE Store.". Nothing has really changed, especially not newsworthy.
I meant independent of this change about monochrome icon sets in general. Like in settings dialogues the menu on the left side. I'm fastest just going by the colors before I have parsed anything else. But yes, also the same applies in the context menu -> open with. So I welcome them not replacing the original app icons with monochrome ones. At first I read the news the wrong way around.
As I understand it from reading the original post, they are leaving the third party apps default icon. They're not overiding with monochrome icons. Bad title by a probable AI rewrite, please read the original KDE blog post linked elsewhere in the thread.
This is KDE's decision on their Breeze theme. Distributions can ship the icon set with third party icons if they want.