Can you elaborate why <i>&quot;client-side decorations are a sin that we should know better than to repeat&quot;</i> ? From a subjective user perspective, I like them for enabling controls in titlebar, which paved the way for compact, elegant windows --i.e. height(clientside_titlebar_with_controls) &lt; height(regular_titlebar + menubar + toolbar)--. What&#x27;s objectively bad about them?<p>Other than that, describing GTK3 as <i>&quot;the official Gnome 3 toolkit, beg us if you want interoperability&quot;</i> seems pretty accurate. I personally enjoy the experience provided by GNOME 3, but will never, ever, use a GTK app under Windows or Mac OSX. They just look and feel terribly out of place.<p>However, does GTK have much choice given the resources at hand?<p>- With the Adwaita theme now being rolled into GTK itself, it&#x27;s becoming clear the GNOME&#x2F;GTK folks are <i>not</i> aiming at a good Mac&#x2F;Windows experience, they&#x27;re maximizing for Linux + the whole GNOME shebang.<p>- Could they do otherwise? Qt is backed by a big team at the Qt Company (ex Digia &#x2F; Nokia &#x2F; Trolltech) with commercial interest to support big $$$ Windows&#x2F;Mac-based enterprise apps, while GTK seems maintained by a smaller core team of RedHat&#x2F;Fedora folks, Canonical not so much, and individual contributors. I think they&#x27;re just focusing.