I disagree with many assumptions in this article, but I want to pick one particular sentence: "In a world defined by business interests and not philosophy, enforced sharing doesn't really make sense", quite the opposite, it makes a lot of sense. Only copyleft licenses protect your investment, creates a level playing field and allows you to build a sustainable business around Free Software leveraging the full potential of a healthy community. https://io.schiessle.org/url/25331