is this theorized somewhere ? Or am i just dreaming ?
(dynamic) functional programming enables very 'easy' succinct abstractions through combing out concretions and composing functions out of a general tool-set. Think code-reuse in the small.
With some discipline you naturally end up with a very data-oriented codebase, where the specificity of your application/library ends up in your data-structures.
Now these data-structures are really just plain data, without specific behavior attached to them, so they embody the (maybe almost) declarative part of your program/system. The next step would be to polish them to make them more human readable.
An additional feature of Lisps is their homoiconicity and macros. These come into play when plain data-structures are not the right fit anymore. Typically you want to handle some user/client defined behavior. You can now transform the syntax of the language itself to clean up your API to reduce boilerplate and increase readability.
In a sense you have now programmed your own DSL.