They are faster, but I don't see how they are vastly superior to a course designed and offered by a subject matter expert in the field.

You can't beat a Caltech-tier lecture, for sure. But you know many people have access to that? You do know. Thousands, and I'm being generous.

LLMs level the playing field for the other 8 billion people.

Reminds of this article[1] that was featured yesterday and which I think was great!

1: https://news.ycombinator.com/item?id=46254794

In addition to the content available on the platforms we're discussing here (Coursera and Udemy), you have things like:

https://ocw.mit.edu/

https://onlineeducation.caltech.edu/courses/certificate-gran...

they have been trained on material not just by single subject matter expert but all of them :)

They have not, because a large portion of the knowledge obtained by subject matter experts in any given field has never been published.

Also, hallucinations are still a thing, and there's a reason why LLMs do not outperform subject matter experts in nearly every field.

I was being facetious but am now extremely curious about large portion of the knowledge obtained by subject matter experts in any given field has never been published - this is not only strange to me in the small but you are claiming that this is large portion so I am wondering if you have any example(s) to share?

Ah, sorry I missed that.

Academics, whose entire careers are based on publishing knowledge, only publish a fraction of their total knowledge obtained over their career. Estimates are that only 10-20% of all knowledge is explicit.