Well, as someone who has only just come back to modeling after a very long absence, I can say that I did not know when I bought it that it was 40 years old! I'm not sure the fact that it is such a venerable model is relevant - it's still on the shelves so a newcomer to modeling (or a returnee like myself) would like to be able to find some information relating to it.
Don't assume everybody has your level of knowledge guys!