Linux is a hobbyist platform for script kiddies and wannabees. It is not a serious operating system.Yeah. Sure.
Tell that to Google, Amazon, Netflix, The New York Stock Exchange, the London Stock Exchange (after a disastrous attempt to use Windows). You probably have Linux computers in your house (computer routers, Tivo and other DVRs, Televisions, etc.).
But if it makes you feel better to think that Linux is only a hobbyist platform, you go right ahead.
Not serious companies. Show me Linux in a company that actually does something.