Lyle Burkhead said
> The Grey Goo is an absurd fantasy, and I treated it with the levity
it deserves.
Let's define our terms here. When I talk about "grey goo", I am talking about microscopic, nonbiological, free-living replicators hardy enough and prolific enough to pose a threat to most life on Earth. Artificial life - out of control - worst-case scenario. What is so fantastic about that?