Some very nice people seem to think that game design looks like this:
Under this model when designing a new edition of the game one need only look back at the immediately previous edition, figure out it where it needs to be tweaked, and blaze ahead into the future.
I submit that the actual situation looks a lot more like this...
...only messier. One of the fundamental projects of the Old School Ruckus is to explore those roads not taken. Game design isn't science. The old schoolers aren't suggesting we go back to a theory of four elements, earth, wind, fire and water. Game design is an art form. Methods and ideas discarded by previous generations are always available for revival, repurposing and new experimentation.