I have a pair of salomon rocker 2s with z12 bindings on a demo plate. Would it be advantageous for my skiing performance to remove the demo plate and have the bindings directly on the skis? I normally hang out on big mountain shoots and dense tree runs.
If you know exactly where your bindings need to be fixed then you don't need the demo plate, and fixing directly to the ski gives a more rigid connection between boot and ski.
A demo plate is only really useful if you need adjustment.