After the hype comes disillusionment and the growing realization that Hadoop and data lakes do not provide the answer for all analytic tasks. However, that is not to say the technology and concept do not have great potential. There is still a need to further explore this area and make the best practices and benefits of Hadoop and data lakes more transparent and tangible based on real experiences. This still appears to be one of the greatest challenges in the debate. To help address these insecurities, BARC analysts compiled a list of some of the popular theories about Hadoop and the data lake concept prior to this survey. We then compared them with the survey findings and added our closing comments.