iOS Evolved quite a lot in the first few releases. iOS 2, 3, and 4 all had major innovation to them and some fantastic new frameworks to take advantage of the

iOS Evolved quite a lot in the first few releases. iOS 2, 3, and 4 all had major innovation to them and some fantastic new frameworks to take advantage of the hardware. Even iOS 5 had some neat new capabilities like CIDetector and some of the CoreVideo->OpenGLES stuff. iOS 6 on the other hand offered practically nothing in terms of lower-level apis, or even bugfixes for bugs that have existed for a few years.