I think the whole idea is to grade all cards the same, regardless of what era they are from. Grading consistently will contribute to low populations of the better condition older/vintage cards, as it should be.
What this does is create the market we are seeing where people feel they have to have the best and will pay dearly for it. In many cases this seems to have increased the value of the lesser condition cards because of the money people will spend on the harder to find better condition cards. Maybe I'm off here.
