I trust that most of the monks here, including myself, never used Oracle, as it is not free.

Depending on your definition of free, you are wrong. Take a look here, and you will see that you can download the latest edition of Oracle for free, under a development license. Personally I prefer to use software that's not just free for development but also production use and modification of course, but that's just me.

<snarky>So why don't you stop XP-mongering with false information :-)?</snarky>