Miguel de Icaza, one of the founders of the GNOME project, has said that OS X has 'killed the Linux desktop'. He cites rapid development 'breaking both open source and proprietary software alike', as well as the 'incompatibility across Linux distributions' as being key reasons for its failure to take hold.
Moonlight, the third-party open-source implementation of Microsoft's Silverlight plugin, has been discontinued due to a lack of demand. The project, created in 2009, provided Linux users with a means to accessing websites and web content created using Silverlight.