Am I missing something or is Recto still inherently linear? Flow control still goes one direction through the rectangles, where as the other 2D languages he points out, Befunge, Fish, and Piet, flow control can change directions. In later versions of Befunge it isn’t even limited to 2D or moving in cardinal directions.

I assume you mean having a USB-C port on the side of the watch. Having that port would allow water to get in to the case, the cradle-style charges used by smart watches allow the case to be sealed to prevent water damage. Even if you are careful about not wearing the watch when bathing, or in the rain, or in a pool, its unlikely you remove you watch every time you wash your hands or wash dishes.