There are more reasons than that. Apple has tight control over its operating system, and even designs many chip components themselves (not all). Android phone m

There are more reasons than that. Apple has tight control over its operating system, and even designs many chip components themselves (not all). Android phone manufacturers on the other hand integrate finished components from various manufacturers, together with their driver packages. If Qualcomm doesn't create a new set of drivers for a new android version, they don't have much of a choice.