Not to start a war, but if it is OK for photographers
to shoot with a Holga, I see no reason to think that
shooting in JPEG is
wrong just a different
stylistic choice.
Rockwell works really hard to get things as he likes
them upfront, so no additional tweaking is necessary.
Lets not start....
From technical perspective, the advantage of raw is that you process the data outside of the camera. So if you don't like the software that process the sensor image in your camera, you have other options. A good example is the two cameras marketed, one by Panasonic and other by Leica, with different software. Matsushita makes both camera and lens and are identical - internally - with only packaging differences, and software that process the data that the sensor captures. The same image taken by both camera (with exact same settings) will show different jpeg results; whereas, if you looked at the raw data, then they are the same.
So raw file processed in Aperture will use different algorithms than Adobe Camera Raw, or any other raw processor available. The reason DNG does not fly with many manufactures is that they hold processing the sensor data proprietary so that one is compelled to buy Canon or Nikon or Leica or brand x. Don't forget that this industry came from optic-centric perspective, and each lens has its own characteristics in terms of color and sharpness (along with other stuff). So they treat their raw processing in the same mentality.
That said, Ken Rockwell and others that just shoot jpeg must be happy with the result they are getting. All the technical argument is mute when one is happy with the image that comes right out of the camera. Why bother messing with all the raw editing and tweeking. Clearly a different perspective than someone spending time fussing with raw file to get the image to look just right after the fact.
Frankly, I don't think there is a right answer or wrong answer to this argument. A "deal-breaker" for one may not be worth considering for another. It just depends on what is important to the decision maker.
Oh yes, there is this argument that if one has fully baked jpeg file and want to improve the image, it cannot be done as well as a raw file with new software and capabilities that are yet to be released in the future. Who is to say that there won't be a reverse processor in the future. If one knows the sensor characteristics and jpeg final color value, it is not that hard to reverse engineer the original value and recreate raw data equivalent....
MBP Mac OS X (10.4.8) Boot Camp/XP Pro