Even though the Williams team has a sophisticated simulator, Hulkenberg uses it as little as possible.
He says the simulator is useful for learning a course, but "it is not real" as the driver doesn't feel the wind, g-forces, oversteer, understeer and so on. Consequently, he doesn't like to use it too much.
Asked about commercially available racing simulations, Hulkenberg said "I don't have a PlayStation or an Xbox."
You can see his point. If an ordinary day at work involved driving a multimillion dollar racing car, would you want to waste time in a watered-down virtual experience during your spare time?