On Wed, 15 Mar 2017, Josh Good wrote:

 It is obvious to me that RMS's GNU movement was aimed at solving that 
 very problem. And if that was a problem, then the "UNIX openness" you 
 talk about does not seem to have been very practical at all. At least, 
 it was totally useless to PC hackers, like Linus Torvalds - he had to 
 write his own UNIX, because he was not able to get any UNIX source code 
 he could readily compile and run on his i386.

Perhaps I'm confused (not uncommon) but I have distinct memories of having 
a source licence for my BSD/OS system on a 386...