Just to give examples that look plausible to me: Because of the legal burden Google decided to implement their own version of the Java standard library based on

Just to give examples that look plausible to me: Because of the legal burden Google decided to implement their own version of the Java standard library based on Apache Harmony. With every new version of Java coming there might be new legal pitfalls to consider and surely almost always the sword of Damocles that Oracle might consider the fact that Google implemented new Java features as a reason to extort more money from Google since they implemented additional copyrighted APIs.