QFE
The last commercial bastion of QFE that I awere of was the Channel Express HP7 fleet about twenty years back.
The main reason that it is still used by the military is to recover fast jets by PAR, it keeps what is a very high cockpit workload to a minimum.
In normal IFR flight QFE is a hazard as at the time of the highest workload, a go around you are expected to change from QFE to QNH and then back for the next approach, the whole thing is a hazard that is unnessesary and fortunately has been consigned to the flying clubs ( some of who are still teaching people Tiger moth limitations to fly diamonds) and very specialist applications such as the military fast jet world.