Comment by JimDabell

> The goal of companies creating these LLMs is to supersede the use of source material they draw from, like books.

Nobody is going to stop buying Harry Potter books because they can get an LLM to spit out ~50 words from one of the books. The proportionality factor is very clearly relevant here.

> If LLM companies are allowed to produce market substitutes of original works

Did Meta publish a book written by an LLM?

> The goal of copyright, under US law, is "To promote the progress of science and useful arts".

I would consider training LLMs to be very much in line with those goals.