I work in the oil and gas industry where legacy systems runs on their last breath. Kafka is a fantastic tool and solves a shit ton of problem. We have millions of sensors on an offshore installation, these all send data into kafka, where we generate events on new topics from different timeseries. Other data services consume these topics and get data updated in near realtime.

No more daily SQL dumps from offshore to onshore and big batch procedures to genereate outdated events.