agreed. The truth is the more expensive the software the more you as a designer gets to charge. + we are often beholden to the manufacture you work for. What software do they use is what our deliverable should be in. No matter how cool a new package seams to be it’s often an uphill road.
As far as proving form. ie. you are sculpting to come up with a new iteration… using T-Splines or another Sub’D modeler… those tools can be great. Often those forms need to be remodeled w/ traditional tools so that changes can be made thru to engineering production. Just be sure to include yourself so the engineering teams dont loose site of the forms if they chose to remodel your concept.