I've worked extensively with RDF triple stores of various types in the past. Not impressed. Too academic, too expensive, bad performance. SPARQL is one of

I've worked extensively with RDF triple stores of various types in the past. Not impressed. Too academic, too expensive, bad performance. SPARQL is one of the worst query languages I've seen. We can thank the W3C for that. Using it for a few weeks makes it clear that it was born in an ivory tower committee rather than engineering experience.