Honest question, who could claim to be damaged by someone running ZFS on linux? The closest I can get is 'unlicensed derivative work' regarding implementing a

Honest question, who could claim to be damaged by someone running ZFS on linux? The closest I can get is 'unlicensed derivative work' regarding implementing a struct of function pointers, which is really contentious and unsettled (oracle v google, APIs copyrightable, etc). I'm not a lawyer or anything close, but who would possibly have standing and motive to sue? There's, what, a dozen people at most who have copyright on those struct definitions? And API copyrightability is still unsettled? Maybe the lawyers were too conservative, and the engineers who listened to them were applying the wrong model? Someone tell me why I'm wrong.