[DustyPorViva]

Keeping a low color count is usually a manner of efficiency. If you're manually picking colors, as pixel artists usually do, it's easier to work with similar colors already accessible in the piece than constantly creating a new color each time you need to color something. In the end, it's also easier to manage 8 colors in a piece when you're trying to touch-up and fix something than say, 32. That's only from a 'work ethic' point of view, that's not taking into consideration the technical reasons, even though there are rarely technical limitations anymore.