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Beth, what I consider a limited palette is an outgrowth of the earth palettes of the "old masters", whose color choices were limited by availability in the first case, and economics next .
Some painters like to mimic printing process CYMK (cyan, or blue, yellow, magenta, black) limiting their palettes to basic primaries, but I feel a high chroma palette however simplified is not a "limited palette" in the sense we're speaking.
The high chroma palette you list is no doubt extended by preferences for subtle nuances of color variations which most painters will need lengthy experience painting to appreciate.
For example, depending on the colorman, many on the list become redundant - there's little "working" difference between vermilion and cad red lt., or pyrol ruby and alizarin, and mixtures with cad yellow lt. will yield a high-chroma orange. Similarly, the violets overlap as do the turquoises, and pthalo and viridian. I note there are NO earth colors other than bt. siena, and no black . . .
Mind you, I'm not saying one may not come to require these colors, and a single pigment will always be more brilliant than a mixture. This palette was no doubt developed by a colorist who has made specific choices based on personal taste and long experience. I'd feel it's a safe bet that not just anyone's pyrol ruby or turquoise shade would suit, either !
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