According to the book 'The Everything Store,' Amazon's search engine is a matter of internal contention. Years ago, when people noticed that Amazon's search engine was terrible (as it is), someone from another group in the company developed a new search system based on Elasticsearch and more modern technologies. He presented the new search to Bezos. But there was an existing team whose primary responsibility was the search functionality. And the man who led that team was one of Bezos' personal friends. That man was, apparently, petty and status-seeking, so pushed back against adopting the new search engine. Bezos proposed that there would be a contest between the old and new search engines. Judged by his friend, head of the current bad search engine team who didn't want the new search because it threatened his status. Predictably, the new search 'lost.'