Assuming you're asking about the Symbian operating system, which was widely used in mobile phones before the rise of smartphones with touchscreens:

If you had a different context in mind for "Sybian matures," please provide more details for a more accurate response.

Symbian, an operating system designed for mobile devices, had its heyday in the early 2000s. At its peak, Symbian was a leading platform for smartphones, especially among business users and those looking for devices with more functionality than basic phones but without the touchscreen interface that was becoming standard.

Symbian's dominance began to wane with the introduction of iOS and Android. These new operating systems offered more intuitive interfaces, larger touchscreens, and app stores with a wide range of applications. Despite efforts to evolve, such as the release of Symbian^3 and later versions, the platform struggled to compete with the growing popularity of smartphones.

The story of Symbian's maturity and decline serves as an interesting case study in the rapid evolution of mobile technology. From its early days as a pioneering smartphone OS to its eventual decline, Symbian left a mark on the history of mobile computing.