I feel that hardwear is quite classic since it’s a revival collection from archived pieces.
The JUC line is also a revival collection. Cartier relaunched the design in 2012. I don’t know if people aren’t aware or don’t know the brand history, or if they only got introduced to Cartier several years later. Anyway, JUC doesn’t have continuity of production/availability, but is somehow considered a classical line from Cartier.
In the same vein that many view JUC as “classic,” the same principle should naturally extend to hardwear. Hardwear also has the same industrial feel as other jewelry from that time. Anyway, I think the design is simple, yet bold, distinctive, and substantial. Which make it something that is more likely to have an enduring relevance.
In general, under LVMH, Tiffany also seems to be pushing for maintaining and highlighting its classical collections, instead of retiring them after a decade. So, I feel that this line is much more likely to be kept in production.