The gist that says Postgres replaces Kafka, Redis and Neo4j (gist.github.com)
The gist sets a deliberately high bar: pick a separate system only after you have pushed Postgres to its limits, documented why it fell short, and accepted the operational cost. PGMQ stands in for Kafka, pgvector and ParadeDB for Elasticsearch, Apache AGE for Neo4j, TimescaleDB for time-series.
Then a Google SRE flips it: you only reach for Kafka or Snowflake at the point Postgres stops being viable, so the comparison runs backwards. And a 20-year ops veteran argues one big database is harder to run than several small ones.
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