Amongst the advantages cited are
Next to capturing the maximum info from the sensor, the best thing about RAW is the post processing that can be done. Because the camera doesn't bake any of its settings into the image, you have a clean slate on which to work. Using non-destructive editing software like Apple's Aperture or Adobe's Lightroom, you can make endless adjustments to the exposure, white balance, contrast and just about anything else you could do in a real darkroom and change your mind later.
These programs never touch the original RAW file; they keep a small text file (just a few kilobytes in size) which contains the adjustments you have made. Each time you look at the photo, these settings are re-applied in real time (although usually there is a preview to keep things quick). Even cropping, dust spotting and sharpening can be undone, years later, with the original file unaffected.
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