If Copilot was released as FOSS with trained model weights, I don't think the Free Software movement would have "shot first" in the resulting copyright fight.

If Copilot was released as FOSS with trained model weights, I don't think the Free Software movement would have "shot first" in the resulting copyright fight. It is specifically the idea of using copyright to eat itself that is harmed by AI training. In the world where we currently live in, only source code can be trained on. If I want to train an AI on, say, the NT kernel; I have to decompile it first, and even then it's not going to be good training data because there's no comments or variable names to guide the AI. The whole point of the GPL was to force other companies to not lock down programs and withhold source code, after all. Keep in mind too that AI is basically proprietary software's final form. Not even the creator of an AI program has anything that resembles "source code"; and a good chunk of AI safety research boils down to "here's a program you can't comprehend except through gradient descent, how do we design it to have an incentive to not do bad things". If you like copyright licensing and just view the GPL as an exception sales vehicle, then AI is less of a threat, because it's just another thing to sell licenses for.