Hmm, you need to read up on what the "jump the shark" expression means and what its origin is. Nike didn't "jump the shark" by adding a plate to the foam. Quite the opposite.
hr measurement wrote:
I still recall Hutchings' commentary from Kimetto's world record marathon, "they're bouncing off of the pavement".
Nike got trounced by Adidas with a better springier foam. So in response, Nike full-on 'jumped-the-shark' and added a mechanical spring plate to the foam, completely disregarding the old rule to "not provide mechanical advantage".