I don't know if anyone remembers early 8.0 or not, but remember when you had to wait the entire length of the opening/closing animation to complete before you could swipe or tap on another icon? They fixed that in later versions of iOS 8. Now, we're sitting here on iOS 9 and that early 8.0 glitch is back where the screen is unresponsive until the animation is completely finished. Doesn't that seem a bit fishy? Almost as if Apple started coding iOS 9 during one of the earlier 8.0 builds and forgot to put some of the later 8.x bug fixes into it. I've just been thinking about that lately. Also, some of the app opening glitches remind me of early 8.0 It kind of makes sense though because I'm betting that the development of iOS 9 started shortly before or after 8.0 came out, and as they were updating 8.0, 8.1, 8.2, 8.3, 8.4, they were probably going back and trying to make sure those features were also in iOS 9, but they may have forgotten some fixes (like the animation thing).