Well i&#x27;m by far not an expert. But a lot of people consider that GPL is an open but maybe too restrictive licence.<p>Notably, &quot;derived works&quot; using GPL copylefted code must be redistributed under same licence. So basicaly if you consider that Swift is a key component of OSX... This is just not something Apple can accept right now.<p>Beside I&#x27;m not even sure a Licence switch from Apache2 is possible without consent of all contributors. And most definitively a Licence switch can in no way be decided via a Pull Request :P<p>Feel free to correct me if I missed a point ;)