Whether you're using a Joy-Con or a Pro Controller, the Switch has ample options available for having someone join you for a gaming session. Multiple designs that address specific needs, one of the best first-party game libraries ever, and a hybrid approach to gaming have helped make it a success, but it's the multiplayer functionality of the console that has helped it reach record sales numbers.
The Switch has proven to be an all-time great for Nintendo, thanks to a variety of factors.