Didn't read the article, but would like to add that there are already programs used and loved by many people, which are using a programming language for configuration. I know just the following, but there are probably many more:
- Emacs which uses elisp an embedded Lisp interpreter to configure but as well to implement new functionality.
- XMonad, a tiling Windows Manager written in Haskell and it is configured inside the program itself, i.e. you edit the main program.
- Guix package manager (and GuixSD, the distribution) that uses Guile (a scheme) to describe the programs to be installed and their configuration. This case is interesting because Guix is using the same concept/functionality to manage the package dependencies which they took from the Nix package manager, but in contrary to Nix decided to use the general purpose scheme programming language instead of a special configuration language.
- Emacs which uses elisp an embedded Lisp interpreter to configure but as well to implement new functionality.
- XMonad, a tiling Windows Manager written in Haskell and it is configured inside the program itself, i.e. you edit the main program.
- Guix package manager (and GuixSD, the distribution) that uses Guile (a scheme) to describe the programs to be installed and their configuration. This case is interesting because Guix is using the same concept/functionality to manage the package dependencies which they took from the Nix package manager, but in contrary to Nix decided to use the general purpose scheme programming language instead of a special configuration language.