I'd say Prolog delivers in a (relatively wide) subset of its domain of application. For instance, I'm writing a solver for some common issues in epidemiology, a

I'd say Prolog delivers in a (relatively wide) subset of its domain of application. For instance, I'm writing a solver for some common issues in epidemiology, at the moment. I was able to write a fully declarative (and purely relational) solution! But yes, some applications are better suited than others.