Comment by pdoconnell

In general the court seems to try to go to the easiest decision point in a case. The copyrightability of an API is less relevant if the user being sued should win regardless because of fair use. This is better than a plurality decision where there's multiple reasonings on API copywrite that make future decisions difficult. Here at least the court gives guidance on how to think about evaluating fair use in this context, which lower courts can apply.