I think EESDL and BEagle have highlighted why most of the world uses QNH - there are a significant number of airfields where the elevation is so high that setting QFE would entail a lot of dial twisting or is even off the scale. The UK, France and the low countries, as mentioned in a previous post, don't have any such airfields and so can quite happily provide a QFE approach.
Toodle pip.