Pass Labs Preamps - New Line Soon?

The Pass Labs XP-10, XP-20 and XP-30 have been out for several years now (since 2009ish).  The just came out with a new top-of-the-line pre, the Xs, with an MSRP of $38K.  

Any thoughts on when they may come out with more "affordable" upgrades to the XP Line?  It seems like it should be about time.