> Note, also, that on a Lisp-family language, creating a DSL is very easy.

I'd argue that this is a bug, not a feature. Yes, DSLs can make for elegant code, but it comes at a high cost in the form of a hidden dependency: the state of the DSL author's brain.

In order for us to share a codebase with a DSL, I now need to understand your unique, high-level view of the problem, and be able to speak it fluently.

And if your view of the problem is incorrect, I need to be able to hold two conflicting viewpoints in my head and find a way to resolve them. (Something that humans find quite difficult.)