Lots and lots and lots and lots of people confusing copyright (an inherent property right granted and protected by the government) and license (a privately granted privilege to use). Butterick—who is no IP fundamentalist, just go look at the license he used for his typefaces—is doing two things: looking at the enforcement of open source licenses so that they are not invalidated by nonenforcement and, related, asking Microsoft to respect the community. I didn’t see him suggest that Copilot is bad or should he shut down, just that they play by the rules. A lot of the reactions here echo a lot of non-developer middle managers who insist that open source code is free and freely usable by anyone for any reason, which simply isn’t the case if FOSS licenses have meaning and value.