No, Apple updates include the full operating system update. The only time features are disabled is when they require hardware that doesn't exist (e.g. you have no finger print reader so you can't use your finger print reader) or they are too intensive for the phones CPU/GPU. That's it. Apple's propensity for hardware accelerators may make this seem like it's crippling (Eg: there is a voice recognition hardware accelerator on Apple CPUs, IIRC) and people may not know why, but Apple does not use crippling software as a strategy to force upgrades-- as you seem to be implying.