I'm not sure I agree with the first one either... I kinda can guess what BigQuery does - probably something with querying a lot of data, so if that's what I need to do, I'm going to check it out, but if not, I'd ignore it. But what does Splunk do? Who knows. Which of the projects with names Beam, Mahout, Samza and Flink I'd need to read about if I need to store and query a lot of data? And after I read about them, would I remember year later which of them does what?