Seems to be a mix. My two friends that game built systems with Zen+/Zen 2 systems and stuck with the stock cooler, as have I (though I do not game as much... I do hear it ramp up a bit during compilation.) My clocks are typically 4.2-4.3 Ghz on a Ryzen 7 2700X, so I don't think I'd benefit much from additional cooling.