Hi
most of TW's in Japan got this kind of extended swingarm even if they're mostly used for urban purpose
there are actually not many TW's like Delphine's one in Europe and she really wanted something different from the usual
I know Japan style customization is not very popular in North America (even if I have some customers in Canada) and hopefully the fact that there are more and more Europeans who tune their bike will increase interest there
cheers