Google is a massive organization, and this is probably the LEAST ridiculous example of redundancy!  I&#x27;ve lost count of the number of database systems they&#x27;ve developed.<p>I don&#x27;t know if they&#x27;re still as committed to this today, but historically Google has been famous for allowing their engineers to spend some percentage of their time on self-directed side projects.  This leads to lots of engineers working on the same sorts of things in different ways.