On a note completely unrelated to anything anyone was talking about, I find it interesting how the result of ramping up digital ISO is a granier image, which is a very similar aesthetic to fast (high ISO) film. However in film, the reason you get a "grainy" image is because faster film has larger silver halide crystals and while they're more reactive with light, they create that "grainy" look because they are, well, larger. So, digital ISO is achieved by adjusting the signal gain to the camera's sensor, a process completely different than brown townog ISO which results in a similarly low quality image. It's interesting to consider that there just may be a baseline of amount of light necessary to produce an image no matter how good technology gets.