When flying into Russia my company uses QFE, it makes the life simplier and safer, but one has to remember to
-set landing elevation at Cabin Press ZERO
-switch EGPWS/TAWS to OFF
-not use the VNAV
The last two items may be the reason for some companies not to use QFE
On the Classic 737 it`s a bit more complicated as you have to use the conversion tables, however with the new equipement (like the Primus EPIC) it`s pretty easy as you switch to metric system including the altitude selection on MCP (or FGC or whatever we call it)