Even my henchmen think I'm crazy.
So, pivoting off of @Odo's thread over here, I've been wondering about this lately.
I used to write about this a bit. The turnaround of the 3DS always made me chuckle at the doomsayers. It's why I was more optimistic about the Wii U early on - I truly thought Nintendo would figure it out do something for fuck's sake.
But they never did. There was no big marketing push, outside of Mario Kart. There was one lone price cut (which made sense for awhile, but holy hell, it's 2016). There was no real aggression to push the Wii U with killer software.
...which leads me to wonder if none of that could have happened because of the rescue mission for the 3DS. Nintendo went on a rampage to save it. They slashed the price and pushed out a bunch of high-quality software.
There's no free lunch, though. Allocating most of your resources in one place means you're neglecting another place. If you block the head shot, you open up the body.
Nintendo didn't put out a killer app for the Wii U until 3D World in December 2013, over a year after the U's launch (and that game arguably looks like it began life on the 3DS, to boot). It's like a death spiral - no killer apps, no driving the install base, no third parties sticking around, no sales, no price cut because you have to maximize profit, lower sales as a result.
But maybe if the 3DS didn't need saving, the Wii U would have had some more horses behind it.