My question "what systemic solutions are available on a scale like Apple's to maintain high-quality and strong consistency?" was sincere. I'm neither complacen

My question "what systemic solutions are available on a scale like Apple's to maintain high-quality and strong consistency?" was sincere. I'm neither complacent (as you seemed to imply) nor magically hand-waiving a "just do it" notion (as you seem to exemplify). I'm seriously interested in what it takes to effectively manage complexity as this scale.