> it simplified the business logic aspect to such a degree that even non-devs were able to be productive with it

* bash (or any shell) -- Might seem odd to call it a DSL, but it certainly embodies the abbreviation.

* Matlab/R/etc.

* Excel (and even VB depending on usage) -- This even plays into "business logic"

You're probably more talking about something along the lines of Gherkin (Cucumber) though. While I've certainly seen it make devs unproductive, I don't know that I've even heard of it achieving the converse unless you loosen the criteria to meaninglessness.