I'm on KDE, and GTK3 apps look better than GTK2 ones, because Breeze Dark is rather tricky to get working correctly with GTK2 on modern versions of KDE. GTK3 l

I'm on KDE, and GTK3 apps look better than GTK2 ones, because Breeze Dark is rather tricky to get working correctly with GTK2 on modern versions of KDE. GTK3 looks almost exactly native (down to window tinting), except that the current version of breeze-gtk seems to struggle a bit with client-side decoration (the minimize/maximize/close buttons that are integrated in the toolbar), making them for example too big. (It's a known regression and should be fixed in the next version, though.) GTK4 and the whole lack of libadwaita theming thing does look out of place though. But I use many GTK3 apps on KDE and they look near perfect. The only thing I can think of is some color-changes when gaining/losing focus are sometimes missing in Electron apps whose menu bar is themed via GTK3, iirc.