I do miss the sound and smell of the pencil on vellum. There is a resistance grabbing quality you can only experience, like the difference between a ballpoint pen and a fountain pen. It you don't know this, you are young enough to be  my grand\child, and probably more comfortable with this particular presentation.
Is it real, or just an elusion? CAD let's me sell ideas clearly, yet, if the result does not look like my CAD creation, I am in trouble, unless or course, results look better than the rendering.