It HAS to... it's your only option!

Maybe, sometime in the future, arrangers will be sophisticated enough to vary the 'busy-ness' of a Part, maybe even smart enough to recognize when we need it and when we don't. Until then, it's one of the unsung reasons (sometimes even unrealized) why people will prefer one brand over another. Seldom articulated, but probably at LEAST as important as sounds and features...