Of course it is a problem with ecosystems that already built around APIs like JSE&#x2F;JEE &#x2F; Java core. It is only a problem, because people did not care much about licenses or questioned copyright in terms of APIs.<p>I believe that APIs are copyrightable. It should be up to the creator to specify licenses that suits his agenda. I believe, if API users care about it and like to build a business on top, only APIs and standards with Copyleft licenses will thrive.