The market will decide if a Weatherby tradename SxS by Yildiz (one of the better Turkish makers) should be added to:
Huglu Round Body
CZs by Huglu
Tristar by Khan
Akkar Churchill
Dickinson by AKUS
FT6 by Kirici Arms (and maybe action by Howa)

I think Borderbill and I are the only ones using SxSs at Ben Avery; a (very) few more show up during Snow Bird season. I don't believe the marketing hyperbole about the 30- and 40-somethings buying doubles.