another reason as if we need one...
I got a nice message on my phone saying that all my contacts and other information on my symbian/n9 or other nokia phones will be deleted if I do not export it or port it to Micro$ofts leaking ship in the clouds - whatever it is called this month.
So to review. I have 2 phones. Less than 3 years old. One of which has Micro$oft software which CANNOT be removed (a precious 45MB of space on this phone). They have essentially killed any chance of the phone receiving security updates, or other information that would prevent a customer coming to harm or losing data.
At least the Meego/Linux phone has an open source alternative, but symbian I suspect you are SOL.