The Wii U was full of some of Nintendo's best games, which allowed you to go on epic adventures that only Nintendo could offer. Unfortunately though, nobody played these games.
Because of this, Nintendo are wisely porting the majority of the Wii U's library over to the far more successful Nintendo Switch. We've seen ports of some amazing games like Mario Kart 8, Hyrule Warriors and Donkey Kong Country: Tropical Freeze, giving some amazing games a whole new lease of life.
Porting over games from the Wii U to the Switch has many advantages such as allowing a whole new audience to experience great titles and it is so much cheaper to make a port than a whole new game.
Unfortunately there are numerous games rotting away on the Wii U, that would make great additions to the Switch's library.