Long cone cells in the human eye are most sensitive to 570-nm wavelengths which are more like spectral "yellow" than spectral "red" and short cone cells are more to 440-nm wavelengths which are more like spectral "violet" than spectral "blue" 1 2. Then why does the additive color model use red, green, blue instead of yellow, green and violet? Is it harder to make red by mixing spectral "yellow" and "violet" than it is to make yellow by mixing spectral "red" and "green"? Would a hypothetical "YGV" model allow for a wider or a narrower gamut than the RGB model? Even if it would allow for a wider one, would we be able to perceive such a gamut?
Note: By 'spectral "yellow"', I really mean 'spectral "yellow"' in white light, not "yellow" as in the subtractive model. 'Subtractive "yellow"' is not the same as 'spectral "yellow"': the former is the result of 'spectral "red"' and 'spectral "green"' in white light filtered out by the ink pigment and perceived by the human eye as "yellow", while the latter is actual 'spectral "yellow"' in white light. Common parlance has always been the worst to describe the concept of "color", because people can mean very different things by "red", "green", "blue", "yellow", "brown", etc. For example, "brown" is a "color" different from "orange", but in fact it is simply a dark shade of the "orange" hue (which is 'spectral "orange"'), and hue may also be referred to as "color".