Design vs styling ...
I would hardly call some new creases on the body surface a design ... it's more a question of styling. Design is more or less the same as it was decades ago.
Automotive design is very limited by functionality. Form follows function. Anything beyond that is pure decoration ... pure styling.
Automobiles are still n-box 3D objects with 4 wheels, lights on the front & on the rear, and at least a windshield (if not all the greenhouse).
You can have a 1-box object like eg vans, or 2-box objects like wagons, hatches, SUVs. Or 3-box objects like eg. sedans. And all the cross-over shapes between that.
Sure materials used can be different: from various metals, leather, wood, cloth, plastic or CFRP, glass ... But the primal shape, design is still the same - since it follows function.
In industrial design in many cases objects are limited by function. Sure you can change the styling, the decoration a bit - but functionality has to stay intact. Just look at the various products: from TV, washing machine, fridge ... or even furniture, lamps etc etc. Not to mention the tools & machinery where all beyond pure functional design is just a make-up (eg. lawnmowers etc).
Bangle: a genius or a kook
Let's first discuss Bangle as designer ... Sure he (re)introduced some styling elements in the automotive design --- the Butt, the convex-concave surfaces etc --- making the styling, the surfaces more 3D. But he sure didn't changed the design paradigm as he had wished for.
His appearance may be quite kooky & eccentric ... strange & odd ... But Bangle sure is a genius. A great visionary ... a great thinker ... a great academic & philosopher. A great manager as well. A great boss. Not sure about being a great stylist - since his sense of aesthetics was a bit awkward, at least when it came to details.
But he sure has dealt a lot with a question of automotive design (not styling!) paradigm and consequently the revolution. Coming with the new ways of living, new ways of (personal) transportation & mobility ... coming with the future. At least in some areas around the globe if not everywhere.
He has been - and he still is - ahead of time. He is playing with concepts that are not eligible for today ... but they sure be in the future. Unfortunately the car industry poroduces products for today, and for tomorrow. And certainly not for day after tomorrow ... or for "the next year". First should come first.
What he brought to BMW -and have changed it forever - is the out-of-the-box thinking. Bangle was the fresh wind BMW needed at that time - not only in design area, but on the whole corporate level. He has shaken the house from base all up to the roof.
But usually - and unfortunately - Bangle is not judged from the academic, philosophical point of view but only from the styling / designing work he had impact on as Head of design BMW Group. Which was at least controversial if not aesthetically challenged.
When considering Bangle on a more academic level (and not just as a design manager or a designer), he is much more appreciated in the automotive design field. And a huge authority, I dare to say. But he is often misunderstood - either due to his listeners aren't able to catch up intellectually with him , or they found the theoretical & philosophical view on design and / or styling just a mambo - jumbo nonsense: since for most design / styling is a visual / graphic and not a vocal / spoken matter.
I guess Hussein can tell us some word on theoretical / philosophical view on design. Or even styling. About the limitations (being that functional, technological, financial, economical etc) of industrial design. The difference between theory and practice. Difference between dreams & reality. What makes an industrial designer a good industrial designer ... just his ideas alone, or also the fact how executable his ideas are from different points of vew (regarding the above mentioned limitations). Is that even designer's problem? Or is his task just to be a dreamer ... and then there are development & production engineers, design engineers, marketing & financial engineers etc to make his ideas possible - or at least set his limitation. Make a box, a frame for him within he can create.
Btw, Hussein, great to hear from you again ... Still @ Audi? Your study @ Pforzheim already finished?