Let's cut to the chase.
People who hate or feel threatened by Nintendo will do mental gymnastics to justify or predict the failure of Switch.
Nintendo apologists will do mental gymnastics to justify the viability of the Switch.
What matters are the millions of people in between, who want to play Nintendo games but are unwilling to pay a premium price for Nintendo hardware.
So if Nintendo nails the price, advertises the product, and supports it with lots and lots of attractive first-party titles, the Switch will be fine. Everything else is white noise.