Earlier quoted context omitted.
IIRC ReactOs forbids you from contributing if you had access to the windows source code in some way shape or form.
They need to train an LLM with the windows source code and ask it to write an windows clone. Apparently copyright law only applies for humans, generative AI gets away with stealing because there is too much monetary interest involved in looking the other way.
I don't think the world really needs that. :)