PostgreSQL appears in every example stack across these articles. Not by accident. It’s the generalist’s database - handles relational data, JSON documents, full-text search, vector embeddings, time-series, and geospatial without specialized databases for each.

One database to learn deeply beats five databases known shallowly. Especially when AI-assisted development makes human verification the bottleneck.

Why PostgreSQL Over Specialized Databases

For structured data: PostgreSQL’s ACID compliance and relational model work.

For semi-structured data: JSONB columns with indexing eliminate need for MongoDB.