I don't buy that. Not for Freespace anyway. If you either have really primitive lighting, or you aren't going to get close to the ship you're looking at, then sure, I'll buy that argument. But with a lighting scheme as complex as that in FS, and being able to literally get on top of whatever you are looking at, and those 100 polys get ugly fast. Normal maps would offset that a little bit, but you're talking about mapping detail beyond plating onto a shape, and once you're in close that is not only problematic but it looks horrible. Especially with spec.