>>49833656Essentially, the reason it hasn't been ported is because the game is so massive they barely managed to get it to work on the Wii U. They had to code the entire game with the Wii U's architecture in mind, and they had to create several data packs you had to download since the disc it came on wasn't big enough to hold all the files. This means that to get it to work on the Switch would require programming wizards working on it for a year or for them to recreate the game from the ground up on the Switch, since the Switch isn't that much more powerful than the Wii U.
If we ever get a Switch 2 with decent enough hardware, it would be feasible to port since the game runs smooth as butter on powerful PC hardware, but even if Nintendo's next console is something entirely different, we'd have to wait for it to come out before we see a port of X.