It all comes down to loss of lubrication at the pins of the chain links. I'd be really interested in what a W X ring is supposed to look like, with 3 chambers to retain the all important goop......
It has not been my experience that more edges result in more sealing. An O ring that fills the gap completely has a thicker 'edge'.... that seems to me to put more ring between the lube and the outside world. Multiple folded layers that can move against each other don't seem likely to seal any better.
The 20K mile warranty..... is that 100% replacement cost, or is it prorated by miles? Who makes that determination?
As I can already get 20-25K miles out of an O ring chain, does this mean I could get 40K out of this magic chain?