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To explain that he brought up a little fun anecdote: the first time the folks at CD Projekt tried to run The Witcher 2 on Xbox 360, it wouldn't run at all. It just crashed.
The first time they tried to render Wild Hunt on the new generation of consoles, it resulted only in a black screen, and everybody was overjoyed
http://www.dualshockers.com/2014/08/17/the-witcher-3s-ps4xbox-one-optimization-going-better-than-expected-differences-with-pc-explained/