No, not at all. Sql is a superset of Kafka, anything Kafka can do a Sql server can do. Kafka is very basic tool in comparison, that drops 90% of functionality

No, not at all. Sql is a superset of Kafka, anything Kafka can do a Sql server can do. Kafka is very basic tool in comparison, that drops 90% of functionality for a speed gain in one use case. There's no reason you couldn't write a custom storage engine that behaved exactly like kafka with Postgres.