That might be acceptable in some disciplines, but it's rarely acceptable when engineers are trading information about solid models. But, while STEP offers significant improvements over IGES, it isn't really a solution, according to Jenkins. The translation programs have the same problems as human translators. So important information about the fillet would be lost in the translation. It would show up, when translated, as incomplete.
Someone has to interpret it.
In a perfect world, CAD designers could share models freely across CAD systems. And therein lies the rub. Translated models have to be opened by a user and gone over for notes and discrepancies before they can be dealt with in the user's system. And then they have to be translated back to a standard format to be sent anywhere. Again, much pertinent information can be lost in this translation.