The point, if there is a point, in upgrading older machines is that you can, to a greater or lesser degree. Perhaps the Classic/Classic II are the least amenable to that generalization, being obdurately in the 'lesser' category, but UnknownK has fingered the reason why we do nurture and cherish our oldies.

I like to think that had I owned the machines that I do now when they were new, I should have been just as keen to push them as far as I do long after their time, given due circumspection about upgrade costs in those bygone days. Having served my time in (paid) museology, I have no leaning towards 'original' state in mere appliances.

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