I thought the same thing when the pp140 was launched 
You may forget how recent that was, and how far things have come since then
I’m pretty sure the advances have a long way to go, based on how divergent the designs are.
The Axis stabs are unbelievably small.
The KT foil has unbelievable aft camber.
Can you share the link? ww2 planes had very conventional airfoils (think Axis), and so I don’t think that lines up with what he Kane has created.
Kane has mentioned evolutionary algorithm foil design (input= performance characteristics you want, computer figures our the foil section to achieve it), I’d be surprised if that didn’t influence his current foil design. His foil is like nothing else on the market, if you’ve held one in your hands you’d be surprised it even functions. I thought it was pretty insane looking.
KT foil such obvious standout that I don’t think I agree.
I always look at inflatable SUPs and think how stupidly big that market is, and how when I first saw them I couldn’t think of anything less appealing and who the hell would buy one… I think this is what drives the QR plates, who can crack the kook market