In June 2008, Nokia made its first big move to turn around the platform, and announced that it was acquiring Symbian, with the intent of turning the OS into an open source project.
Two years later, the move to open source has proved to be a miscalculation that is slowing down Symbian’s development. It would be better for Nokia to take full control of the OS, according to Wood. A lack of support from other vendors means Nokia has to do most of the work itself, while the open nature of the platform allows competitors to keep a close eye on its progress.
via Nokia on long comeback trail after smartphone misses – Digital Lifestyle – Macworld UK.
Then there’s LiMo foundation open source mobile Linux. Maemo is/was open source, Openmoko and Qt Extended and PalmSource/Access moving to open source and there was the Motorola Linux OS that launched years ago. If Open always wins, whatever it wins, it’s not market share.