Running a small ES with dual save alongside your relational store is trivial. Kafka I will grant you is a lot to operate, but I would not choose Kafka unless I

Running a small ES with dual save alongside your relational store is trivial. Kafka I will grant you is a lot to operate, but I would not choose Kafka unless I have a Kafka-shaped problem, and if it looks like that I would never, ever choose Postgres. Equating Kafka with “I need a queue” is a laughable comparison.