just imagine that after crash you see gas, oil or radiator fluid leaking from the car leaving the stain on the road. or fluids inside cistern leaking.
That would be very cool in career mode for instance to adress the fluids by mileage and if there is in the future a used car market also a chance to change spark plugs, ignition coils, distributors in cars wich has this type of system in ignition. Theres a lot of possibilities to enhance the gaming experience and adding meaningful content to a career mode. Seriously, this would be awesome to work with a car, maintain it and upgrade it to sell in a used car market to make a possible upgrade. IMO.