Earlier quoted context omitted.
Richard Stallman is wrong about linking.
As far as I understand it, Richard Stallman has gotten his view about linking from FSF’s lawyers, who has advised the FSF about what does and does not count as a “derived work”, in the sense of US copyright law. If you want to argue that the FSF’s lawyers are wrong, please provide more detailed, and hopefully referenced, arguments (as opposed to plain assertions).
They reference a less on point but better known case (https://en.wikipedia.org/wiki/Lewis_Galoob_Toys,_Inc._v._Nin...., for some reason you have to manually add the period at the end of the link) about whether NES cheat cartridges were copyright infringement. If a work that directly links to and interoperates with a program is a derivative work of that program, the Game Genie really was illegal after all. To me that doesn't seem right, and given the FSF's general opinion on console restrictions (https://www.fsf.org/bulletin/2025/winter/new-nintendo-drm-ba...) I kinda feel like they'd have to agree.