Dropping 32 bit compatibility
How could iOS 9 drop compatibility with 32 bit binaries when it runs on 32 bit hardware like iPad 2 and iPhone 4S? Until they drop compatibility with all pre-A7 CPUs, they can't even drop 32 bit code from the OS let alone 32 bit app compatibility.
But I agree, it refers to the amount of free space needed at install time, iOS 8 didn't take up all that much space (I think a little over one GB) The problem was that if you did the install over the air (rather than connected to iTunes) it was really inefficient in however it was doing it. Guess they heard the criticism and addressed the issue for iOS 9.
Biting the hand that feeds IT
