Honestly the Wii U had an amazing library of games. Nintendo squeezed a bunch of extra juice out of Switch using nothing more than straight ports of Wii U games onto the more popular Switch.
But like you say, the Wii U hardware just didn't fly off the shelves like Nintendo had hoped. Though there is a big difference between Nintendoland as a launch title and Breath of the Wild.
But like you say, the Wii U hardware just didn't fly off the shelves like Nintendo had hoped. Though there is a big difference between Nintendoland as a launch title and Breath of the Wild.