There are mainframes & COBOL still around, but speaking as someone who's never worked in the sort of place that uses the trendy things mentioned on HN, I would say Oracle and things built on Oracle are my concept of "normal".
I don't know how decision makers think, but I get a general sense that Oracle is the safe "you can't be fired for choosing..." choice.
I don't think these places have just one server, though, far from it.
