Correct. The 4Ax is.Does Nathan power through his jumps? Because he always had problems with 3As. So did Shoma Uno by the way when he started learning quads and 3A, and look at his 3A now.
It's a stronger jump for some and harder for others, but it's not an ultra holy grail that tells whether you are jumping right or not Skaters're all different, you know.
3A is the most difficult jump for some skaters probably, but it's not THE most difficult jump of ALL jumps for ALL skaters.
I think Sasha cannot do 3Ax coz she cannot jump face first close to a corner. Her 3Ax requires same amount of preparation as a quad.
Tuktamisheva can do 3Ax in the rink's center.