Complex sentence: Most classical work on arithmetic of elliptic curves over number fields did not include the use of associated hyperbolic curves, this the methods of IUT are, to a substantial degree, very new for most experts in the classical theory.
Split into simpler sentences: Most classical work on arithmetic of elliptic curves over number fields did not include much use of associated hyperbolic curves. Thus, the methods of IUT are of very novel nature for most experts in the classical theory.