Replying to Bindings: The old and the new

yo. I have a two part question here...

The other day I was looking for bindings and was looking at the new Attack 16s and the old Peak series bindings(15/17/18). Obviously metal is more durable than plastic, but why did Tyrolia change the design to have so much more plastic in the toe? Does anyone know the benefits(besides weight)?? I would be happy with the Attack series if I know why they made a decision to change their design/if the new design is truly as durable as the old.

What are the benefits/drawbacks to the new attack series compared to the old Peak series?

Which design is/was more durable?