I elaborated on the general problems with them above, and Martin&#x27;s blog posts are on spot.<p>It really is more of a theming problem – Gnome 2&#x27;s standard themes were in the really awkward spot where the controls are far too big than they need to be for mouse or stylus input, yet not big enough for touch input.<p>(Back then, I had a stylus-enabled X60 Tablet – with a whopping 1024x768 12&quot; screen. I modded my GTK2 theme to have 8x8, 12x12 controls and icons, instead of the standard 24x24, 48x48. 30% more usable screen size without any changes to applications.)<p>With Gnome 3 deciding to focus on touch screens, they had to do… something! And that something was making controls even bigger. And to offset that, they decided to introduce CSDs. There&#x27;s a dozen other ways that could have been taken instead, like not using a touch interface on non-touch devices.