Well I found this oracle-xe article hilarious. Here are a couple of choice phrases:
"Deploying [oracle-xe] can also offer a solution to the common problem of users or developers downloading and installing open-source databases, which leaves you with a minefield of maintenance, support, and security headaches"
Excuse me? I could easily rewrite this to say
"Deploying an open source database addresses the common problem of paying exorbitant license fees for a proprietary database that hogs resources, requires expensive DBA staff to keep it running and offers few tangible advantages over a robust, easy to manage, secure and maintain open source database system such as PostgreSQL."
The article has more similarly laughable statements….which leave me just shaking my head….