Yup. It goes far beyond the effort taken to run it. Straight out of the preface of Site Reliability Engineering, a book written by Google SREs, "estimates 40-90

Yup. It goes far beyond the effort taken to run it. Straight out of the preface of Site Reliability Engineering, a book written by Google SREs, "estimates 40-90% of the total costs of a system are incurred after birth". Edit: This was meant to go under one of your post's child comments, and hopefully isn't too out of context misplaced here.