I find limited palettes hard work though, because it involves so much mixing. There are certain premixes and earth colours that I really love. I don't want to spend ages trying to mix those myself every time.
Pretty much why I don't use it myself.
That, and really, apart from the cyan blue in the cool, the ultramarine blue and orange red cadmium in the warm, the colours aren't absolutely bulletproof lightfast. Just pretty good or very good and much better than Alizarin crimson. God forbid any painting should be left in full sunlight, but if the primary palette pictures are for many years, they'll be like those photos that end up fading leaving the blue portions. The perfect original image is only as durable as the weakest pigment.