The Nintendo Switch was the number one selling videogame system in the U.S. in April. That came as total U.S. imports of videogame machines climbed for a second month. Imports in April increased 63% on a year earlier in volume terms after a 37% rise in value in March. That ended a growth drought going back to October 2015. Nintendo shipments led the way, rising 220% on a year earlier in April though supply chain issues meant seaborne shipments fell vs. March. That’s required the use of airfreight to maintain sales. Sony’s PlayStation and Microsoft’s Xbox imports fell 37% and 23% respecti...