Whatever the solution is to AGI, fundamentally it will still have to be describable in the language of mathematics (and stochastics is still mathematics).
I dunno. You're limiting your thought to computer science. I think it's more likely at this point in time biotech will produce an AGI, likely by accident. Worse one that competes directly with us for resource. We dont have a great mathematical description of our own intelligence, doing it for a tricked out slimemould would be just as hard.
I don't put learning state of the art ML past Carmack, at all. However, does ML tech of today lead to general AI? It's a strong assumption.