Huh. This actually makes sense. I decided to go all digital for the Switch and I guess having a physical copy of Mario Kart 8 for Wii U doesn't look so bad now.I can't be arsed. I probably won't make much on it and I intend to buy the Switch version digitally anyway, so it'll be nice to be able to hold onto a physical copy.
Of course, it'll be weird when Mario Kart 9 comes out. There has never been two Mario Kart games on the same system before (excluding Virtual Console).