Just want to chime in. Zhenni, cofounder of PuppyGraph. We created the first graph query engine that can sit on top of your relational databases (think Postgres, Iceberg, Delta lake, etc.), and query your relational data as a graph using Cypher and Gremlin, without any ETL or a separate graphdb needed. It's much more lightweight and easy to spin up. Because we sit on top of column based storage and our compute engine is distributed, we can achieve subsecond query speed across 1 billion nodes. Please check it out!