All this Lutz talk and edges and I think that people don't know or have forgotten about what a Lutz is really about.
The idea of the Lutz is that you
jump in the opposite direction from the edge that you have.
Look at this - at 0:48
https://www.youtube.com/watch?v=CoaDbxfjqas
Maria Butyrskaya from 1996 worlds. She holds her deep outside edge and as a result she is
drawing a circle from the right side of the rink to the left. Then she jumps in the other direction. That's a Lutz.
Then look at this - at 0:38
https://www.youtube.com/watch?v=l7dmp_GaJcw&t=195s
Maria at 1998 Olympics. She has changed her technique here and goes into the Lutz
in a straight line (=flat edge) and then changes her edge to an outside edge just before takeoff. This is also a Lutz - BUT here the whole idea of the Lutz is gone.
She is not jumping in the opposite direction. She just changed her edge JUST before takeoff.
This latter technique is used by
EVERYONE since the late 90s. And I think it's hilarious that people use Yuna Kim as a textbook example as she always went into her Lutz in a
STRAIGHT line, which means it's a flat edge, and the whole idea of the Lutz is gone.
What the ISU should do is to
redefine what a Lutz really is. Is it the Lutz that Maria did in 1996?, well then everyone should get edge calls now, because
no one just doesn't jump a proper Lutz like that anymore.