Why does the title mention specifically duckdb and postgres? It sounds like it supports multiple embedded and remote databases, and I don't see anything special in the README specifically about this pairing...
A potential use-case for consolidating data from many duckdbs into a destination PostgreSQL + PGVector would be to build Edge first Gen AI,Rag Search applications using DuckDB's vector storage and search capabilities, while enabling real-time data data + embeddings consolidation from all application instances into a centralized PG + PGVector to readily enable global RAG applications.
More details here: