[taylanub]

Guix is a big effort at making a purely functional package manager with a large recipe database and all kinds of bells and whistles you want in a full operating system.

Emacs's minimal package manager is to install Elisp libraries (and nothing else) on every platform where Emacs runs, including MS Windows, and you can be happy it does dependency tracking.

The two can't really be compared. Maybe in 10 years Guix will run on all platforms and have its components separated in such a way that it's sensible for Emacs to ship a version of Guix with it for Elisp package management, but don't hold your breath.

So I don't think NIH applies there.