Valid point but the author misses the mark a bit. Apple probably won't move away from ARM but instead enhance and mutate their own ARM design. The A5, A6 and be

Valid point but the author misses the mark a bit. Apple probably won't move away from ARM but instead enhance and mutate their own ARM design. The A5, A6 and beyond could retain 100% binary compatibility but also offer many new features. At that point it would technically be an ARM CPU but to be used to its maximum you would need a compiler ready to support all those new features. In the case of a product like the iPad that was unveiled to the public only 2 months before it went on sale it would be difficult for third parties to keep up. From Apple's perspective sharing this type of information publicly on a reasonable time frame to support third parties could take away a significant advantage they have with in-house CPU development. If you're going to tell your competition 6 months ahead of time what you're doing by the time you ship a product they're going to be less than 6 months behind you.