I am a firm believer in QNH having used both systems over decades. It is, however, a fallacy to say that it is "standard". As soon as you venture East of our new enlarged Fourth Reich (sorry - that should say EU) then there is no such beast as QNH. All procedures involve flying Flight Levels above transition and QFE below. Some of the larger airports also report QNH for information, but smaller ones do not. Add to that the metric altitudes and much fun ensues!
Happy flying
