The thread two days ago wasn't very informative. People acted as if The Witness had been ported to the Shield tablet, when in fact it had been ported to the Shield Android TV.
Here's some actual information: www.gamnesia.com/news/jonathan-blow-will-see-about-releasing-the-witness-on-nintendo-nx
Now that we know more about the specs, is it possible for it to be ported? Blow says that it requires 5GB ram and that the Wii U has only 1GB. Is the Switch good enough in that department?
I can't imagine too many people are buying games for the Shield Android TV, just because I've never heard of it. So if the Switch has the specs and is easy to port to, there's at least a chance.