Most of the blog seems to be about the difference between copyleft and permissive without saying so. Even so, permissively licenced software was necessary to ge

Most of the blog seems to be about the difference between copyleft and permissive without saying so. Even so, permissively licenced software was necessary to get the ball rolling. Copyleft may have not caught on in the same way (in products rather than used to host) but you can't separate out the engagement of the software from the licence.