So we're now in this world where everyone is instantly 10x more productive at turning their thoughts into code. Now, think about the coworkers you've had that are middling to mediocre. Do you want them to have a tool that makes them 10x more productive?

That's what I wonder about, what happens to all those folks.

In the worst case it’s an even greater “productivity” boost for those mediocre folks, as they will also undoubtedly be less critical of its output.