I worked for semantic web startup. The idea was we'd build private "knowledge graphs" for companies especially Pharma and Biotech. We experienced something similar to what you describe. We had a nice RDF generator and a query engine. The idea was we'd parse data from clients' DB and unstructured stuff and generate semantic graphs - whcih would be used for semantic graph apps like search and inferences. Looking back, it was never going to work. Most clients came to us for "analytics dashboard". They were happy with giant tables to power these dashboards (and they were right!)