The article goes deep into these two cases deemed most relevant but really there are a wide swath of similar cases all focused around defining sharper borders than ever around what is essentially the question "exactly when does it become copyright violation" with plenty of seemingly "obvious" answers which quickly conflict with each other. I also have the feeling it will be much like Google LLC v. Oracle America, Inc…
Ideally, Congress would just settle this basket of copyright concerns, as they explicitly have the power to do—and have done so repeatedly in the specific context of computers and software.
This solution to me amounts to an "everybody wins" situation, where producers of material are compensated, model trainers and companies can get clean, reliable data sets without having to waste time and energy scraping and digitizing it themselves, and model users can have access to a number of known "safe" models. At the same time, people not interested in "allowing" their works to be used to train AIs and people not interested in only using the public data sets can each choose to not participate in this system, and then individually resolve their copyright disputes as normal.