It probably has fallen in between, because, you know, because… 
Forum RNG Theory - General Discussion - Diablo 3 Forums (blizzard.com)
But more seriously. The first Buriza I found I am still using. Found more than 15 other Ethereals since and they all will probably getting trashed - besides the two other Burizas I found. Now that I know that one can “update” them…
Before someone “complains”; only playing on my other, long abandoned account currently, because it is nice to get some achievements again… 
DisasterArea#21638 - Community - Diablo III (blizzard.com)
EDIT: WOW, just while I was writing this, it happened!