An anonymous reader writes "Peter Penz has been a user of KDE since version 1.2, and he led the development of the Dolphin file manager for the past six years. Now, he's quitting KDE development and handing off Dolphin. His reasons for quitting KDE development are described in a blog post. Penz speaks of KDE losing competitiveness to Apple and Microsoft due to increased complexity and other reasons. 'Working on the non-user-interface parts of applications can be challenging, and this is not something that most freetime-contributors are striving for. But if there are not enough contributors for the complex stuff behind the scenes and if no company is willing to invest fulltime-developers to work on this... well then we are losing ground.' Are open-source desktops losing?"