B. Stroustrup once inferred that C++ is a language, whereas in the Lisp or Smalltalk world, coders commonly try to provide a complete environment for programming in use, furthermore in describing a language's characteric, as in C++, if you are working on a UNIX system, C++ will sound, or feel, like a UNIX language, and if on the other hand you are working under DOS, it will feel like a DOS language.
 
https://www.youtube.com/watch?v=69edOm889V4&spfreload=10
The Design of C++
 
17:39 minutes into the video - 1994 
 
If one maintains the view that the motivation of the coders for work listed on the cited cat-v webpage was to have accessible 9P for use on GNU/Linux, that such labour hours were soley pursued predating the release of the Linux kernel version 2.6.14 (on 27 October 2005), with its v9fs (http://v9fs.sourceforge.net/),† or otherwise delegated to coding languages' exercises and "proof of concept" endeavours, and, that Lisp coders' provision of an environment is complete, and, Elisp coders dispute the first paragraph's description of a language, then, I guess, the position of RMS is correct.
 
https://9p.io/wiki/plan9/v9fs/index.html

† The word Wiki points to a dead link.