@futurile One upside to Guile Scheme I didn't see mentioned in the survey that's huge for me (though I've only dipped my toe into #guix thus far), is the simple "not a DSL" aspect.
Too many tools use DSL's unnecessarily, which just adds cognitive debt. A relatively minimalist general purpose language is IMO usually friendlier + more rewarding of the time learning it. And when it's a #lisp, you can (if you're a hipster) get going pretty quickly even if it's a dialect you haven't touched before!