As I understand it Kafka was high-throughput/high-latency, whereas MQ (at least RabbitMQ) is the opposite - low-throughput/low-latency. So they're solving diff

As I understand it Kafka was high-throughput/high-latency, whereas MQ (at least RabbitMQ) is the opposite - low-throughput/low-latency. So they're solving different problems (streaming vs. message delivery)