Indeed, Antoine de Saint-Exupery said it best: "Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away."
Unfortunately, as developers, we're always at odds with the reverse tendency, expressed by Zawinski's Law: "Every program attempts to expand until it can read mail. Those programs which cannot so expand are replaced by ones which can."
Might as well go and remove the game qualifier from that statement, and its still true.
Even as someone who isn't particularly interested in game dev, this series is fascinating and I eagerly await more.