Neptune sucked the air out of blazegraph as well... It is a constant problem. Graph databases will only ever become more mainstream when we get a real postgresql-level database in term of reliability, maintenance and trust in its evolution.
PostgreSQL is a fine graph database. It would be nice if it supported the graph-like query language that's now being standardized as an extension to SQL, but other than that it works quite well.
Well yes, if you need to run actual graph algorithms on network data I agree that pgSQL (or any general purpose database, including "semantics" oriented graph db's) is not the best.
