Ok, I'll buy that for looks the third belt/buckle may be something that you might like because it's "traditional", but other than looks, why would you ever want one?
There are two big minuses for me. 1, it's just something else to catch on something, and 2, doesn't it defeat the purpose of that nice big deep pleat?

As I understand it, the deep pleat helps in movement (and maybe even in modesty when you sit) but what the point of having it, if you're going to restrict its movement with a belt?