The costuming of each of Rand's ancestors is ALSO insane, each iteration of the cadin'sor a step forward towards the one we recognize on Janduin and the modern Aiel, and each reflecting the moment that ancestor lived in:
Charn has simple but well made work clothes that reflect his upbringing as someone form a culture that still practices agrarian farming in a sci fi utopia. It's simple brown that looks more rough and rustic standing in contrast to Miren's sleek white lab outfit, but still contains the hints of modern amenity: his over the shoulder cape, the buttons on his coat and shirt. This is someone who lives in a society where he could be wearing something more clearly modern, but deliberately choose something humble and simple.
Then you have Rhodric in a much sleeker and darker version: the rustic agrarian element has been traded for a straight lines. Everything is imminently practical, from the thick soled work boots, to the leather vest with it's own clip and zippers, to the trousers that allow for range of motion. Rhodric was living through a time of war and now apocalypse. Even his people, sworn to peace, have been altered by the realities of the world they live in, and what their role as servants to Aes Sedai, leaders in that war, demanded.
Centuries later, the cadin'sor has been entirely lost, and Jonai is in what we can recognize now as Tuatha'an style clothing, which makes sense since this is where the two cultures split. Gone are the sleek uniform lines Rhodric was wearing but the deliberate rustic vibe Charn had has not returned. Instead everything is clearly (and messily) hand made. Threads are hanging off a poncho that is clearly hard used. Everything is ill fitting- on Jonai and every one else in this scene. Adan's shirt hangs askew because it's to large while Sulwin's skirt drags in the skirt because it's to long. Their are all these efforts at bright colors and patterning- but their irregular and imperfect. The breaking is taking it's hold and exacting it's price.
Two generations later, Jonai's great grandson, Lewin and his fellows have something that that is first step towards modern Aiel cadin'sor. Everyone has adopted browns and grey, brighter color has been dramatically scaled back, and while stuff still isn't fitting great, it's fitting better. Practicality is back as the main focus, and we see sharp lines return as well. Lewin is the ancestor that most resembles Rhodric, because like with Rhodric he has had to make concessions in himself for the realities of a violent world. The veil appears for the first time, and the colors are now locked in: brown and grey, to match their desert environment.
Jumping forward centuries again to the pre-Clan Aiel, we get Mandein, a sept chief from right before the Aiel cultural identity starts to codify. He is wearing a leather cuirass over a simple linen shirt- the colors are consistent now. and everything is well fitted. The biggest difference is how his rank as a chief is conveyed: he is slathered status symbols, from his cloak, to his sea shell necklace, to his spear with special inlay- all things that demonstrate his singular importance in a society grappling with scarcity. Their is also no uniformity when we see the other sept chiefs during the meeting- everyone is styled differently, draped in different kinds of status symbols. The modern Aiel as a culture now exists, but a common cultural identity is still in the process of forming and getting locked in.
And then finally Janduin- post that cultural identity being codified for two thousand years. He and all the other Aiel warriors are uniform with a clear vision- and being influenced by aesthetic sensibilities that incorporate every step backwards through time. A curiass that seems heavily based on the vest of Rhodric and the others during the war period but with the clear underpinning of being real armor like what Mandein wore, a metal buckler strapped to his back right where the Aiel work hats used to hang during Charn's day, and of course, Lewin's veil but also his same basic silhouette and linens. The only one not represented here is Jonai- which makes sense since that is the lowest point in the Aiel's history, reduced to refugees being preyed upon without anything but their oath and each other to sustain them. Most strikingly to me is the complete absence of any status symbol- Janduin leads many many more people then Mandein but his spears are the same as his soldiers, and nothing marks him out as their leader even in the thick of combat...because such symbols are unnecessary. His right to lead, we know, is carved into his arm.
