This article points to another bit of the technology stack that Apple doesn&#x27;t own - LLVM IR.<p>LLVM is open source and therefore doesn&#x27;t require licensing unlike the ARM Instruction Set, but it&#x27;s another thing they don&#x27;t perfectly control and they&#x27;re happy with that.<p>Developing a new ISA would be extremely expensive, and they&#x27;d have to have a really good reason for doing it. The post doesn&#x27;t suggest why it would be beneficial, merely extrapolates a pattern.