How can one say: And not a single one of these game is using that "Component Entity System". That seems like an impossible statement without deep knowledge

How can one say: And not a single one of these game is using that "Component Entity System". That seems like an impossible statement without deep knowledge of the inner workings of the popular games you are referring to, which you certainly don't have access to. Also, CES is a fairly longstanding design pattern for game development (at least 10+ years) - I refer you to this comment: http://news.ycombinator.com/item?id=4907998 http://news.ycombinator.com/item?id=4907998