>Kafka is not a messaging queue. It's a log.

Kafka bills itself as a "messaging system".

>The same underlying structure used within our RDBMS to provide all the guarantees Kafka provides.

Is there perhaps a reason that people use the RDBMS scaffold atop this "underlying structure"? The point I'm making is that Kafka is not safe for use cases that demand robust data storage and integrity, at least not in comparison to the standard of safety set by the traditional systems of record for important data (RDBMS).