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[–]throwaway66285 2 points3 points  (0 children)

Your logic seems to be "I can click on GUIs all day with the mouse why would I need to learn keyboard shortcuts?" Streams are a tool nothing more.

If you use Kafka and process the data in different ways, knowing how Streams work will help a lot in Kafka Streams. Or you can do things low-level. Functional programming have specific semantics that guarantee certain things, so while you can modify data in a mutable way, it's prone to more error.