This is absolutely valid. There is a comprehensive analytics platform that I work on where we went from (a litany of) REST services to our own domain language.

This is absolutely valid. There is a comprehensive analytics platform that I work on where we went from (a litany of) REST services to our own domain language. It not only allowed us to go across databases (Graph / RDF / RDBMS) but even across processing engines (R/Python). This is really where I think the industry should go. I am sure someone will point out there is a great talk by Brian Kernighan on this on youtube.