I don't think it's an issue of 'we'll continue to use it because we use it'. I have no problem using QFE, I use it virtually every time I fly. I have no problem driving on the right when I go to Europe or the States; but wouldn't it be better if everyone drove on the correct side of the road? It's probably my OCD that desires uniformity. QFE works just fine but there's no reason to have it. Not that I can see anyway; however as a civ end user I respect the opinions of the more experienced and professional aviators on this sub forum. If you say it's essential then I can't really argue with you.