One problem with words like "traditional" is that they will mean different things to different people.

If one uses "traditional" to mean, "what I learned from my father and grandfather," then one could correctly say that only an 8 yard knife pleated kilt is a "traditional" kilt.

If one uses "traditional" to mean something more akin to "as practiced in the past," then one could correctly say that a 4 yard box pleated kilt is quite "traditional!"

And so you could have two people arguing over what style of kilt is more "traditional" than the other, and both would be correct!