I don't think there's cause for so much doom and gloom about sales and support. Well sure I guess on the support side for the fools who expected western third party support that Nintendo was never going to get in a big way, but not to anyone who had reasonable expectations about support (Wii U and 3DS type support combined, along with some Vita only type stuff prior).
I'm disappointed because it's becoming clearer as more details come out that the Switch is more a 3DS successor with a TV out dock due to the power hit the "console" side is taking due to games needing to run on a portable and the portable base where the processing is needing to be smallish.
But the 3DS sold well while the Wii U failed so it's probably a wise move for Nintendo. It's hard to not see this hitting at least 40-60 million sales even if the Wii U/3DS market diminishes some. I'm just not as interested in it as I sold my portables months back as I hadn't used them in ages. I have a dedicated gaming room that I share with no one, drive myself to work and only fly a handful of times a year. I just have no use for gaming anywhere other than in my recliner in front of my 55" gaming TV.
I'll still get a Switch if the price is write ($200 or 250 with a game or I'll wait for a drop/retailer sell/bundle) and the software support is strong. Which it should be as the Wii U and 3DS library together is quite strong with both Nintendo games and Japanese third party games. So while I'll be a bit let down by the lack of power, it's not a gigantic deal as I do 90% of my gaming on PC and PS4 anyway as my tastes shifted away from Nintendo's offerings starting with the N64 and especially with the Wii. I still like some of their franchises and they make nice palette cleansers/something different in between all the shooters, WRPGS, action/adventure games etc. that I mostly play.
I don't see where in my posts I act like this isn't risky, might not just fail, etc. It is risky. Japan might bet against itself. It might not sell to Japan. Even if it does it might not be able to leverage that in the west. But, putting out a corebox that couldn't leverage what support Nintendo has left and couldn't compete directly against PS4 in a generation it already won outside Japan?! That is more risky by far.
To me, and I've said this a bunch of times, what would have been least risky is sticking with Iwata's family of consoles statement for NX--now Switch.
Launch a console in the West. Not super powered or anything--could even still be Tegra X1 based. Instead of underclocked, it could have been overclocked a bit to get closer to Xbox 1 levels etc. It could also be cheap as the chips aren't powerful, and there's no screen, joycons etc., just the console and a packed in controller.
Launch the portable in Japan. Plays the same games as it has the same chips, just underclocked. So putting it in PC terms it plays most games on Low to Medium settings while the console plays them on medium to high. The portable could be smaller and more ergonomic etc. due to not needing to have detachable controllers, slide into a dock easily etc.
A few months later as stock has stabilized launch the portable in the west and the console in Japan for those who want to play their games home and away.