Relevancy is irrelative when you have tons of money from running Steam. -15% off, -60% off, -40% off, etc .. you know the drill. All the sales and discounts and the money just flows in like a wide river. Why dev games anymore when its no longer your core business ? The game dev that Valve does has become more of a hobby, some side projects to do when not maintaining the river of money flowing in their direction.