It's certainly not possible the quantum computing doesn't work at all, because it works. As you scale up, you might very well hit places where quantamalgarithms are faster. Personally, i think itis emely unlikely that there is some modification of quanta mechanics that prevents quantam computers from working. I don't even know what that would look like. Ah, so i don't know. So if stephen wolfram wants to predict it, that's the kind of prediction i would encourage people like him to make and weigh more precise.