My thought is that Raw mode and either of the semi-manual shooting
modes ( Av or Tv; even P with shift ) are very similar, in what
they give you and what they cost.
You get more control over the process when you shoot in Raw mode;
you get to make decisions ( about contrast, color tone, white
balance, &c ) that the camera would make in Jpeg mode. This can
translate into better photos if you make better choices than the
camera. But this means time and effort; you have to convert your
own files. And you have to know what you're doing.
The 'advanced' shooting modes are the same story. You tell the
camera what aperture to shoot at to control depth of field, lens
sharpness, and so on. Or what shutter speed to control movement,
to freeze lens shake, and so on.
I can't really imagine why anyone would want to deal with Raw
files, but not want to shoot in Av/Tv/M mode?
