I think there are several issues with the Solitaire. One is that they probably don't sell many compared to their other lights and revamping the line might not be worth it right now. Another is that making an LED focus properly (and Mag considers focusing to be the company's signature feature) in such a small form isn't easy. The AA MagLEDs, at least from looking at the patent, seem to have a very large mechanism. A third might be that there are several other makers of LED AAA keychain light right now, any one of which might have patents or trademarks on various features.
Who knows what we'll see in time. A company the size of Mag has to work in a different way compared to a small maker like Arc, etc. When they make a new product they can't make a handful and see how they sell in specialty stores and to CPF members. When Mag rolls out a new light, it basically has to be ready to be sold in every single flashlight-carrying store (everything from Wal-Mart to Ace Hardware to Walgreens to Ninja Dan's Tactical Warehouse & Motorcycle Store) in North America. Maybe they're not ready for that with the Solitaire. The new D-cell LED lights appear to mostly be like the incans. The AA models are where the R&D and new production expenses are going.
