Comments moved to <a href="https://news.ycombinator.com/item?id=11781053" rel="nofollow">https://news.ycombinator.com/item?id=11781053</a>.
This is possibly my best-case scenario. APIs are copywriteable (so says the Supreme Court), and this seems reasonable, since some APIs really are very good and treating them like an artistic work has benefits. But implementing them is fair use, preserving the utility of APIs for compatibility. Great news!