In many parts of the Western US and Western Canada, the airfield elevations are too high to allow the use of QFE - there isn't enough sub-scale to allow you to wind the altimeter back to zero - I know, I've tried it at Calgary. I forget how far I could go, but it wasn't the full 3550'.
In a previous discussion on this topic, it was mentioned that American Airlines used to use QFE, but they had to have specially built altimeters