More than a decade ago I worked for a few years on a product that was based on OWL/RDF/SPARQL and since then I still see a lot of problems I'm facing in terms of subject, predicate, object triples.

The semantic web feels like a fad that has clearly passed but there are plenty of good ideas from that field that are under-utilized. For example, a lot of what gets encoded as JSON can be described with these triples and once the data is in that form, there are interesting questions you can ask of it.