When comparing Plan 9 vs Guix, the Slant community recommends Guix for most people. In the question“What are the best operating systems for advanced users?” Guix is ranked 6th while Plan 9 is ranked 22nd. The most important reason people chose Guix is:
For those with a clear focused concept of what is wanted, after building, the build can be replicated in a blink on countless machines. Both GUIX and shephard are complex but also a breath of fresh air.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Well designed
Plan 9's design is very orthogonal and well done.
Pro Designed to allow for multiple computers to work as if they were one
With Plan 9, computers are turned into terminals where you can access files and processing units which can be located elsewhere. Data storage is handled by another external server. This means that instead of each person having their own individual computer with all the required parts, all of the computing and storage is done in a central area and everything is networked in together.
Pro Atomic package management without bloated init/supervision systems
For those with a clear focused concept of what is wanted, after building, the build can be replicated in a blink on countless machines. Both GUIX and shephard are complex but also a breath of fresh air.
Pro Secure rootless installation
While the whole system can be configured using a declarative file with sufficient privileges. Users can install any package in their own local profile with a single command without root.
Pro A truly advanced operating system
Solves modern problems of software management in one concise, coherent, and fully integrated system.
Cons
Con Difficult to use software made for other systems
Plan 9 is very different from most other operating systems, and as such it's extremely difficult to bring in software designed for other operating systems ('porting').
Con No fully featured web browser
As indicated on the official Bell Labs webpage, there is no full featured web browser currently working on Plan 9, except abaco.
Con Not supported by most tools
Not supported by most dev tools beyond text editors.