It's official - Studio One is 10 years old! Version 1 was launched on September 27 2009. Here's the original press release. The celebration video nicely shows the evolution of the application.
Studio One 10-Year Celebration video
Btw, this year also marks the 20th anniversary of the CCL framework since it's inception in 1999, and 15 years with the source code that's being used today.