TL;DR: The big tech AI company LLMs have gobbled up all of our data, but the damage they have done to open source and free culture communities are particularly insidious. By taking advantage of those who share freely, they destroy the bargain that made free software spread like wildfire.
That doesn’t make it “no longer copy-written” though. The original copyright holder retains their copyright on it. I can’t see any court ruling otherwise.
The output of the LLM can be incorporated into copyrighted material and is copyright free. I never claimed that the copyright on the original work was lost.