Is there any specific application, that needs 7DOF and cannot be done any other way? I guess, that Igus will give you other price when you ask them directly and

Is there any specific application, that needs 7DOF and cannot be done any other way? I guess, that Igus will give you other price when you ask them directly and 50 pieces. I am not related to them, but I like their approach. Plus I have no problem controlling stepper motors directly.