Andrew Kim switched away from his iPhone because of an unreleased software update:
Well, it’s iOS 7. I’m sure I’ll be soon receiving emails arguing that it’s still in ‘beta’ and that I’m a total idiot. Well, I know that it’s not complete. Frivolous things like icon design aren’t even the biggest problems I have. To me, iOS 7 is sailing in a completely wrong direction. What needed to happen was a significant rethinking of iPhone but all we received was a facelift. An ugly one at that.
Control Center, iTunes Radio, AirDrop, the new Photos app, improved multitasking, enhanced folders, more gestures? Those don’t count. Apparently.
Oh, and iOS 7 is beautiful.