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October 2019 NPD: Switch was the best-selling hardware platform, still the best-selling platform of 2019
Switch continues to perform well in the United States. Once again, the system was the best-selling hardware platform. Additionally, it remains the best-selling platform of this year. Last month, Nintendo announced that Switch had surpassed 15 million units sold in North America. Switch sales in the region were up more than 20 percent year to date. Source
Brian