After branding myself a Debian user because of apt-get, and making use of pkg-get on Solaris, and having run Fink on OS X, I wonder -
Is it worth trying to get Fink running on NS/OS/Rhapsody?
Would it make it any easier to get (and keep) a full, modern GNU userland?
Would it help to get Darwin-built packages running?
Probably not. In terms of modern UNIX support, NS is very different.