Worth pointing out that running Kafka is itself no small thing. So now you've added BI and also Kafka, which itself requires a bundle of services to operate. An

Worth pointing out that running Kafka is itself no small thing. So now you've added BI and also Kafka, which itself requires a bundle of services to operate. And you have to keep BI and Kafka in sync with all your various other data stores' schemas, and with each other. Which all gets back to the point of the OP.