because it is a safe move
The drawing design must go to the Engineering department where they will review the design and the components that will go into that vehicle. Sometimes Architects can not forsee design flaws that can stress or cause problems. That is were the engineers come into play to make it happen. The design then needs to find a compromise between looks and what is easily available on the shelf. More sharing of parts the cheaper the vehicle. If parts need to be custom made then the price has to go up and possibly not in line to what the consumer is willing to pay . During testing engineers might find handling characterists from the original design and must then change them. The prototype then morphs into this compromise. The last move is the public reaction. In most cases the OEMS will ease the design in multiple models to see the publics reaction and incorporate it to the consumer more gradually. Hence the Avalanche look into other GM product lines, Cadillac, BMW, Viper into the Chrysler line and the list goes on.
To me the hardest part is working with designers. You can tell them that it might look good on paper or model but the budget or physics is just not functionable and not profitable. Designers might find it easy to just click here or erase and draw there but for the engineer it is not as simple as that.
Of course if money was no object then all is possible but most times than not the engineering group has a budget and time frame to work within. If you miss those two items then you can miss "entry into the market" and lose first market share.
The F117 was thought among pilots not to be flyable. But with enough money and if the technology exist then it is possible. Sometimes the technology does not exist and the engineer must wait. Hence the B2 bomber which is why the Flying wing was torn down and scrapped until the time was right.
So.... It is people like you that deserves the :thumbup: because of your input we make the changes and you buy the products. It is people like you that keeps us employed.:D