What are RDF graphs and OWLs commonly used for?

Not sure if this is the right site, but I’ll give it a go.

I find the concept of the Semantic Web fascinating, and the idea of using RDF triples to represent semantic data. But obviously the vision of the Semantic Web as put forward by Berners-Lee hasn’t materialised, which leads me to ask: what are RDFs and OWLs used for today? Are there widespread practical applications for these concepts? Are they being used in research projects currently? Or are they just relics with little use outside of academic interest?