I've used specific films over the years because of how they look, how they render color, or their grain. I've used papers for print color and surface. In some recent threads I've expressed my disappointment that several films and papers that I use have been discontinued and gotten a surprising amount of grief for stating that simply switching to another film didn't work for me. So, do the materials matter? Is any color film just as good as any other? Is any B&W paper just as good as any other? And why?