Symbian won
I was working in the mobile phone industry just as smartphones were taking off. I saw the Palm Pilot rise and fall. I witnessed NEC and Sagem and a host of companies launch smartphones and then disappear. But the greatest tragedy of them all was Nokia and their Symbian Operating System.
Symbian was, for its time, a brilliant OS. It ran 3D games smoothly, had terrific hardware support, a decent ecosystem for developers. And it was bloody annoying for users.
Every few minutes, Symbian would interrupt you to ask Are you sure you want this app to connect to the Internet?"
His final paragraph has a point.