It's also good that Breyer wrote this opinion, given that he was one of the two judges who dissented in Eldred v. Ashcroft almost 20 years ago[1]. Lessig called that opinion "perhaps the best opinion [Breyer] has ever written"[2] in his retrospective on the case.

[1] https://en.wikipedia.org/wiki/Eldred_v._Ashcroft

[2] https://www.legalaffairs.org/issues/March-April-2004/story_l...