10 IT Skills Rapidly Headed Toward Extinction  4. C'est La Vie
Silverlight  There was a time when Microsoft's Silverlight
positioned itself against Adobe as a more efficient alternative
to Adobe Flash. But the interactive Windows add-on, Silverlight,
never caught fire. Worse, it still doesn't work on the Windows
Store (a.k.a. Metro) or Microsoft's own Windows Phone. Global
Knowledge said Silverlight's days are numbered, along with any
developer that isn't becoming an expert in its successor, HTML5.