I think there are two camps. The old fashioned guys, used to 100 ISO, or lower, film that got their skills perfected in the pre-digital time and the newcomers that started with a mobile phone. When you are used to film you are looking for a camera that can deliver an image that can outperform film as, when you are used to mobile phone images, you are looking for something that outperforms a phone, not only in image quality but also in handling. With a high ISO camera you get that last. But the old fashioned guys are still waiting for their high detail full frame camera. And as long Canon does not deliver it the discussion will go on.