Apple is just hopeless at producing quality software. As a developer, I dread every time I get a report of something not working properly on version 'x' of iOS, I know I'm in for a long painful session with the xcode simulator trying to reproduce and fix it. Every new version introduces its own new slew of bugs and incompatibilities with previous versions. I'm no Google fan, but Chrome/Android is light years ahead of Safari/iOS in my mind when it comes to stability and quality - even with the apparent disadvantage Google has of running on hundreds of different devices from different manufacturers as opposed to Apple having to support just a few of its own devices.