Should we put a knowledge graph under our RAG, and what will it cost to keep it true?

Written for engineers who already run a vector retrieval step in front of a language model and are being asked whether a knowledge graph would make the answers better, so they can decide with measured

Written for engineers who already run a vector retrieval step in front of a language model and are being asked whether a knowledge graph would make the answers better, so they can decide with measured costs instead of demo videos. It then widens to the leads who approve the indexing budget and to the people who will be paged when the graph goes stale. Numbers without a citation come from one reference build: a single 41-page survey paper turned into a Neo4j graph with local open-weight models, w