Has it really though? The Wii U was a crucible that made rabid, nearly fanatical Nintendo fans. If you go by basic generational attrition, you had a minimum of a 9m fanbase that would literally purchase anything that Nintendo makes, regardless of trade-offs or price. Thus far, we've seen, maximum, 3m total units sold. Strong for a Nintendo console, yes, but I've seen nothing in the sales to make me change my mind on my projections for the Switch. If and when it goes materially above the 13m Wii U sales, say 10% above, then I'll account it a success. It likely will, within the first eighteen months, but those are always the best months of sales for any console. The intrinsic issues with Nintendo's offerings, the utter lack of any strong western multi-plats, and the continued lack of information regarding its online services or VC, tells any reasonable person that Nintendo has not diverged to any great degree from the same corporate philosophy that caused the Wii U disaster.
The reason that the PS4 trounced everything in this generation has been the breadth of experience available on the platform coupled with ease of development (both architecture and sufficient spec overhead to allow rapid development with few technical hiccoughs). The Switch allows for broad situational variability, with some caveats, but the game experiences that I've seen on offer so far are literally no different that what was available on the Wii U. Until that changes, I'll remain most pessimistic.
You bring up interesting points
It was my Impression WiiU was the biggest Nintendo failure for a long while even though people that owned them enjoy it.
And switch is onto a swift recovery from that.
But you definitely know the matter better than me
And I guess good to be skeptical
But I seriously haven't owned a Nintendo system for keeping since GBA/N64 so I guess I'm optimistic