It will be really interesting if AI starts stepping meaningfully into the music industry. We have really thoroughly explored copyright law for music in the courts. There are fewer gray areas for AI companies to hide in.
Many tech corporations appear to operate under the "its easier to ask forgiveness than to ask permission" mantra. So they simply don't care about copyright. They will happily break the law by downloading millions of copyrighted works, make billions from the results and then eventually pay back a few hundred million to those that it has wronged.