And the post I just made implies that kiltmakers who leave out inverted pleats do so for a specific reason. In most cases, a kiltmaker actually just makes a kilt a particular way because that's the way that particular kiltmaker learned how to make a kilt.

Some variations don't make a whit of difference, whereas others matter a lot. I don't make our band kilts (except my own), because a) it's too boring and 2) I know how many of the people in the band treat their kilts....Aaaaanyway, the company that makes our band kilts has kiltmakers that put darts in the front of the kilts that need a lot of shaping, and they continue the taper of the pleats and the apron edge all the way to the top of the kilt. This makes the top edge the smallest part of the kilt, and it has the inevitable result that the kilt sags because it's impossible to buckle a kilt tight when the smallest part is at the top of the kilt and not at the line of the buckles. My point? This is not the right way to make a kilt and makes the kilt hang wrong, but they've been doing it that way for years.