> Until recently, it was "extremely far-fetched" that copyright law prevents you from independently reimplementing an API.
No, it really wasn't far-fetched; quite the opposite.
Don't confuse legal opinions with advocacy. Unless you're paying someone, what you read and hear online is advocacy. Attorneys in the FOSS community are no less guilty of pretending that their advocacy is the letter of the law than anti-FOSS attorneys.
I believe celebrity FOSS legal scholar, Lawrence Lessig, for example, has lost on the merits every major copyright case (as listed on Wikipedia) he got behind. (And other ones, too, like the two major election law cases mentioned there.) But all his books and articles preceding those cases, and sometimes even afterwards, made his position sound like a simple application of well established law. It was a simple application of law, alright, but of the law he and many others desired, not the law as it existed or was likely to exist when subject to the scrutiny of the court system.
While U.S. courts seem to have begun more rigorously scrutinizing pro-patent holder arguments, the opposite is true when it comes to copyright. U.S. courts are increasingly kinder to a very broad and strict (i.e. fewer defenses) application of copyright law. It's a real shame, and we could lament all day how they're "getting the law wrong", but people should set their expectations accordingly. For example, don't expect SCOTUS to overturn Oracle v. Google, at least not to the extent that it supports Google's original defense that APIs aren't copyrightable. There's a reason the judge's original opinion siding with Google was so exceptionally long and detailed--he was trying to bend the law in a different direction than it's most recent trajectory. He did an admirable job, but his interpretation was sadly but firmly in the minority.
No, it really wasn't far-fetched; quite the opposite.
Don't confuse legal opinions with advocacy. Unless you're paying someone, what you read and hear online is advocacy. Attorneys in the FOSS community are no less guilty of pretending that their advocacy is the letter of the law than anti-FOSS attorneys.
I believe celebrity FOSS legal scholar, Lawrence Lessig, for example, has lost on the merits every major copyright case (as listed on Wikipedia) he got behind. (And other ones, too, like the two major election law cases mentioned there.) But all his books and articles preceding those cases, and sometimes even afterwards, made his position sound like a simple application of well established law. It was a simple application of law, alright, but of the law he and many others desired, not the law as it existed or was likely to exist when subject to the scrutiny of the court system.
While U.S. courts seem to have begun more rigorously scrutinizing pro-patent holder arguments, the opposite is true when it comes to copyright. U.S. courts are increasingly kinder to a very broad and strict (i.e. fewer defenses) application of copyright law. It's a real shame, and we could lament all day how they're "getting the law wrong", but people should set their expectations accordingly. For example, don't expect SCOTUS to overturn Oracle v. Google, at least not to the extent that it supports Google's original defense that APIs aren't copyrightable. There's a reason the judge's original opinion siding with Google was so exceptionally long and detailed--he was trying to bend the law in a different direction than it's most recent trajectory. He did an admirable job, but his interpretation was sadly but firmly in the minority.