I think soYou've got to remember the NEC is NFPA70 which at its core is focused on fire protection. To say voltage drop is a secondary issue to the NFPA is a true statement. You may have a system that is NEC complient but not work for your application. That is the engineer's problem not the NFPA. If you have a wire not able to handle a load and therefore starting a fire is a primary concern for the NFPA.