I actually don't really know if the "Switch can't play DS/3DS library" bit is true.
One curious thing about the 6.2 inch screen size is when positioned vertically, the screen is the *exact* size width wise in that config as a regular 3DS. Funny coincidence no?
They could theoretically offer a cradle that can position the JoyCons on Switch vertically for DS/3DS backwards compatibility and sell DS/3DS games through the eShop.







