[reubenmorais]

>However, an even cooler move would be to make LLVM IR the official binary representation of OS X, and compile it as part of the install step of a new program.

So a user installing Firefox or Chrome or some other complex application would need to wait for tens of minutes before they can use their application? It's more likely they'll just re-use the existing dual arch architecture but instead of PPC/x86 it'll be x86/ARM…

[Tloewald]

OpenStep supported four processor architectures before it got ported to PowerPC, and used to support "quad fat binaries" that would run seamlessly on all four architectures.