Sued ... of course. But what will they claim? The courts have declared that training an LLM on copyrighted data and then having it produce anything DOES NOT make a derivative for the purposes of copyright. That it is fully owned by the person who used the LLM and zero licenses are needed to sell it, rent it out, or whatever.
> But what will they claim?
Copyright infringement obviously.
> DOES NOT make a derivative for the purposes of copyright
Or maybe you have misunderstood the ruling and thats why the stocks of these companies hasn't plunged.
Seeing as your prediction completely failed, it seems way more likely that actually you just misunderstood the ruling.