I meant to add an example of where RAW might be preferable ...
Jason shoots with settings of enhanced sharpness, saturation and contrast to get the effect he likes. This is fine for that particular instance of the image, however, should a publisher want to print this, they may prefer a lower contrast version (since many print processes actually increase contrast). They may also prefer a slightly softer version so sharpness can be optimised to their print process.
Jason's jpeg can't be modified to meet printer's needs without some further deterioration of the image. A RAW file, however, can be postprocessed an infinite number of times to produce output for a specific requirement.
On the other hand, he'll get approx 3x as many shots onto his storage device as I well shooting RAW.
Colin K. Work, Pixstel