[RandyRanderson]

Randy's law of config files:

In the limit, all config files become a language.

So if you have a so-called "declarative" config file, it eventually becomes a ... ? Language - that's imperative. Every time. Yes, really.

What is the only time this doesn't happen? If the config system ceases to exist.

[SAI_Peregrinus]

It doesn't have to become an imperative language. It could turn into Prolog.