I always shot on color neg stock for my professional work because I had (and I still have!) the facilities to do my own processing and printing so I could supply large prints which were closely colour-matched to the original objects.
You also have the advantage of being able to adjust the colour-balance very precisely, and Dodge and Burn as well, when you print your own negatives and you can't do that with transparencies.
It gave the Separators no leeway when they were told to "match it" but they soon discovered that they could do so; and the lower range of tones in a reflective print reproduce more closely to the original when C, M, Y and K inks hit paper than do the high-contrast colours in a transparency.
Clients seemed to appreciate the fact that what eventually rolled off the Press retained a very close match to the photographs which they had signed-off on.