I believe the main use case for Prolog is to create other languages and DSLs on top of the Prolog engine, especially rule based and logic-aware languages. This

I believe the main use case for Prolog is to create other languages and DSLs on top of the Prolog engine, especially rule based and logic-aware languages. This is the kind application for which Prolog shines due to its characteristics. A huge example is the early implementation of Erlang, but also some more niche stuff related to the semantic web like [1]. [1] https://github.com/motools/musicontology https://github.com/motools/musicontology