Just Use Postgres

A few years back I inherited a system that had Postgres, Redis, MongoDB, Elasticsearch, and RabbitMQ. Five different data stores. For what was, at its core, a CRUD app with some search and background jobs. &#xA; Each one was added to solve a specific problem. Each one made sense at the time. And each one was another thing that could break at 3am, another thing to monitor, another thing nobody…