I use KDE (in fact typing this in Kubuntu Xenial) but my main criticism is that KDE would definitely not pass a hallway testing. Here's an example: switch the

I use KDE (in fact typing this in Kubuntu Xenial) but my main criticism is that KDE would definitely not pass a hallway testing. Here's an example: switch the desktop theme to oxygen. Suddenly, something as mundane as switching airplane mode on and off with the default panels becomes crazy difficult because you can't see the images next to the check box (oh and for some reason all check boxes look like square radio buttons now). I'm sure KDE works great for the people who have used it for years but they don't have newcomers complaining about usability or they don't listen to newcomers complaining about usability.