So it is mostly a matter of actually caring to dive into it.
Not only one will discover how many of the Plan 9 design issues got worked on, some of the design ideas that went into Go will be more clear.
It is also revealing to dive into Oberon OS linage and then see how some of its design went into ACME on Plan 9, dynamic loading on Inferno or eventually Go's method call and unsafe package design.
I bet not many professors bother to dive into it.
The documentation is still available, http://doc.cat-v.org/inferno/4th_edition/, and you can get it as open source and commercial variants, http://www.vitanuova.com/inferno/
So it is mostly a matter of actually caring to dive into it.
Not only one will discover how many of the Plan 9 design issues got worked on, some of the design ideas that went into Go will be more clear.
It is also revealing to dive into Oberon OS linage and then see how some of its design went into ACME on Plan 9, dynamic loading on Inferno or eventually Go's method call and unsafe package design.
Instead most get off at the Plan 9 train station.