I've heard that Visconti are going to phase out the Dreamtouch Pd nibs...the relaunched watermark series and the Voyager 30 all have 18K nibs.
Flipside? The newer nibs are insanely expensive. I queried getting one for my watermark to swap out the Pd nib, and they are EUR315+VAT for F, M and B and the EF and Stub will be EUR363+VAT
I'm not sure whether they're just meant to replace the Pd nibs or are simply another tier up...Considering they're a good EUR125 (ex-VAT) more expensive than the Pd nib units, this could mean the refreshes of the HS series could go up by as much as US$200(!)