Honestly I think the Wii fit phenomenon is dead and was limited to the Wii. The Wii U Fit was a big failure that sold under a million while the two Wii Fit games sold over 40 million. Wii Fit was a fad that lasted only as long as the Wii lasted. Wii was marketed as a way to be active while playing video games, which played directly into the Wii Fit marketing. Switch is marketed as a way to play console level video games anywhere, that doesn't tie into Wii Fit at all. Just like Wii U was about being able to take your game off the tv and still play in the house when the tv was being used, which didn't tie into Wii Fit marketing. Let's be honest, Wii Fit is not a good way to get in shape, its a low level of activity and I think after the Wii phenomenon was over people lost interest in a Fit-like game.