Thanks for the detailed explanation!

Distribution and user theming is also significantly improved over GTK with programmatic generation of themes—automatically adapting colors at runtime to the most ideal contrasting color values via OKLCH and other related algorithms—which distributions can use to customize to their preferred branding, and app developers can freely adopt without needing to worry about user themes breaking their apps. Users also get the convenience of generating their own custom themes with COSMIC Settings, even if that means creating an abomination of conflicting colors.

I've themed my 22.04 install to death -- literally -- as one would expect from a first Linux install. I've been clicking through multiple GUIs where only the checkboxes, dropdowns and radio buttons showed, zero labels or descriptions. Most recently the Raspberry Pi Imager.