In my hippy days I used to wear ankle length skirts, fairly wide at the hem but tapered to the waist - that way they can be cut from a fairly small piece of material by laying the pattern pieces / \ then \ /. I have ridden a BSA 650cc motorbike with sidecar when wearing one

The problem with making a long kilt is the double layer and discontinuity of the aprons - with a long skirt you can simply take hold and lift at one point and the entire hem will lift up. With a kilt style you need to manage two layers and under apron pleats - though perhaps it would be possible to make a sort of picking up strap attached to the back of the apron and threaded through eyelets to the innermost layer. Even then I can't see it being worn by anyone who did anything active - pacing along carpeted corridors or tiled cloisters would probably be OK, stepping out of taxis into a bar might get a bit exciting, but anything more vigorous and I'd say lose the kilt...

I have Thai trousers - the sort which wrap around but have open sides, and they have to be pulled up to ascend steps. Hakama, I find, have to be shorter than ankle length if not to be stepped on.

I have thought of making a long skirt with a kilt style panel of pleats at the back and three panels for the front, with single pleats at the edges of the centre front panel. I would use material too light for a kilt, 45 inches wide and perhaps 5 yards long. There are border prints which would do very well for the ladies - but I really don't see the long kilt as a garment for men.