AFAIK it's not the trustzone part of the exploit chain that they are protecting. I don't believe SciresM is holding on to it just to annoy people.
Its a lot of details, and its not just the TrustZone but the general point of it is that Nintendo's mitigation isn't just about TrustZone and they'd know the full extent of the flaw because they know the flaw. There's only so much they can do against lolnVidia.









