I'm Dorado Gold also. I'm guessing they're dropping the color because it's not a big seller. In fact, if you go to Edmunds and price out a used 4 Runner in Dorado Gold they decrease the price because of the color.
I bought mine because my wife liked the color better than silver. Though I've come to enjoy the fact that it hides dirt and dust really well, I hate that for the same reason, it never looks great when it's clean either.