> We've made it through decades without breaking theming, what changed?
According to the GNOME team, application developers were getting bug reports filed against their application about broken interface elements, and GNOME was having bug reports filed for the same. The devs stated it was the fault of the theme being used, and as such it would eliminate a lot of headaches for both if themes were forbidden.
"Independent developers" set out to explain this in more detail. [1] While it is targeted at vendors who created their own themes for branding, it echos the overall sentiment toward theming from GNOME itself.
I'm not talking about a library, I'm more concerned with DEs implementing the library.
Things like swipe with three fingers to switch desktops, swipe up with three fingers to show open windows etc. Why is all that stuff tied to a UI theme?
Swipe to switch desktops is implemented in GNOME Shell and Mutter. GNOME Shell's default CSS style is also called Adwaita, but it in no way affects the availability of gestures.
Why do those things have to be tightly coupled all of a sudden? We've made it through decades without breaking theming, what changed?