there's places in mozart AND beethoven where sfz is used in a 'piano' context. that's all i meant. and, there are places where it is in a 'forte' context. to not distinguish between the two is all i meant.
and, to distinguish between a mozart forte and a beethoven forte (esp. later years) is not disputed.
seems that people think sfz means crashing in general, sometimes, but u have to make it purposeful and not a sudden shout in the ear - like ur totally deaf.