This is what bores the hell out of me when people start whining 'WAAAAH! Its crippled' and 'Canon only want to protect their XXX camera'.So yes it is crippled somewhat, but there are reasons for it (to make it more reliable as they claim) and it will be fully usable in the real world.
They place no thought into why the specs are what they are and every manufacturer bar none puts things in higher grade models that are not in lower grade models.
I guess what they really mean is 'Why can't I buy a 1Dx3 for the price 90D'. Ho hum.