I’m noticing more and more Apps actively trying to avoid Themes and instead opting for the fixed default look. Even some of the Default Gnome Apps. And then there are initiatives like Please don’t theme our apps. Is this the slow death of GTK Themes, and if yes, why?
Themes break things and libadwaita isn’t backwards compatible with old GTK themes. However, libadwaita is actually pretty easy to theme so we might see a comeback at some point