Yeah, I get what you're saying CatVert, but I think it is an emotional thing. It doesn't feel like it's really the "same car" if it's been rebodied. Physically it may not matter at all, or make any functional or aesthetic difference, but emotionally you know that it isn't the actual shell that was built as the GT-E being advertised.
This analogy may be a stretch, but what if medical science got to the point where elderly people could have their brain (complete with memories, consciousness, personality, etc) transplanted into a younger body so they could keep living? Is that still the same person? How would that feel to their family members & friends? I know that probably sounds ridiculous, but many car guys feel like cars have souls and personalities, and once you transplant its heart into another body, it just isn't the same.
I have an emotional connection to my car, in that it was my grandmother's car. I feel bad enough about all the original parts that I've had to sacrifice (or have lost) in the quest to restore it. Every piece that gets replaced, takes a little something away from that connection I feel with it, and from how I remember it as a kid. It'll be much nicer, and it's still the same car, but in some ways I almost regret restoring it, if just for the loss of originality and memories. If I had to rebody it, I feel like that would defeat the purpose. That would no longer be my grandma's car.
Sorry for the ramble, but those are my thoughts on the subject...