One key difference is that an LLM really is better than any human at almost everything, simply because the LLM is kind of OKish at millions of things that each

One key difference is that an LLM really is better than any human at almost everything, simply because the LLM is kind of OKish at millions of things that each single human is just terrible at or completely ignorant of. The common LLMs are not trying to be a better human than a single human. They are trying to be more useful per $ cost than a bevy of humand doing some basket of human tasks. Making a replacement for an individual complete human, an effort that was popular before the Internet made that idea seem quaint, is very different challenge, and more niche, because it's not as economically efficient.