Mr. Adventure wrote:
You'd think they'd manufacture a lot more commando droids and droidekas. I guess the assumption is that they are expensive/hard to manufacture.
According to a behind-the-scenes article I read recently (I think it was an interview with Matthew Wood, the Lucasfilm sound engineer who does the voices of Grievous and all the Separatist droid types), the idea behind the basic, stupid grunt-type droids is that they're cheap, mass-produced, and expendable, which is why their mental capacity is so limited. So I'd say you're right -- the more capable, smarter ones are costlier and thus less common.