A bit of an 'own goal' this best practice.....
One of my error traps is that if the controller says 'millibars', I know the QNH must be below 1000. (This phraseology standard is published).
There may or may not be safety benefits in the widespread use of the word, but without publicising this change of phraseology, one of my error traps has disappeared. No problem, because it wasn't an important one, but:
WHY DID THE PEOPLE WHO DECIDED ON THIS (AT A LOCAL LEVEL WITHOUT APPROVAL FROM SRG) NOT PUBLICISE IT?