Yeah, yeah, yeah . . . we know.
It IS unusual and far from Apple's regular practice. And even in the example you give the design remained the same; only the internals changed.
First off, please don’t speak as if you get to speak for others. Fine if you know that, but not everyone does. I also can’t read your mind so if you knew that there is no way for me to know that you did. The bad attitude isn’t necessary either. I also never said or suggested that it was usual. Read more carefully or ask for clarification next time.