Can't say I agree with pushing the envelope (exposure) means you are getting the most from your gear...
Years of shooting film teaches you to light and expose for the final image. This is a solid skill.
A digital camera teaches you to do everything a digital camera can do. And the modern Exmor-based cameras are for the most part /gain optional/. Push the shadows at ISO100 by 4 stops gain on an Exmor camera, and you have a clean ISO1600 equiv. Employ according to creative whim.
