Some cameras do the multiple exposure combo thing: see the Panasonic G85. For pro tier cameras, the problem is that no software manipulation can ever read the

Some cameras do the multiple exposure combo thing: see the Panasonic G85. For pro tier cameras, the problem is that no software manipulation can ever read the mind of the photographer and what they want, so you have to have a way to opt out of in-body post processing or there will definitely be times you're fighting the camera to get what you want. On professional shoots or at fast moving events like a wedding, no professional will tolerate their camera having a mind of its own and editing the files in a possibly-unpredictable way. So if that's the case, why even include the options at all? Professional photographers have the technical skills to get what they want from the camera by turning the normal ISO/shutter/aperture knobs and don't need those headaches. Casual users don't know or care what's possible and just want a photo that "looks good" which usually means in focus and a little extra saturation. "Prosumers" or "techy users" are the hardest to pin down, but that market may be disappearing anyway.