I can see your point with the lack of updates, but most companies like this move to a set plan and it's difficult to change that because of changes in computer technology. I was in this same position with G-Force/G-Media over the UB updates for impOSCar, Minimonsta, M-Tron and Oddity and when I saw they were about to release a new product (called VSM), it seemed to everyone that they weren't working on UB updates at all, but new products instead, which made a lot of people very angry indeed!
Luckily, I knew better, as due to e-mail networking with the joint owner of the company (Dave Spiers), I was lucky enough to know that Apple changing over to Intel chips caused a lot of problems for a lot of companies and because I'd switched from my G5 Mac rather too early, I became a beta tester for many companies and could see the amount of background work going on behind closed doors was quite amazing, for as well as them having to devote time to making new product releases, they really were trying to move at the fastest speed possible on the UB updates.
I am sure Arturia will release an update for the 2600-V (and CS80-V), it will just take time. It's over a year now since Apple made the switch to Intel and not every company has product updates available yet, so it's not just Arturia in this possition and when they've commited to plans for making new hardware products (such as the Origin) with tradeshow deadlines to meet and a new software product in the Jupiter-8V, it's difficult to have the time to fit everything in and keep everyone happy.
That said though, they should post an announcment or at least mention something in the newsletter so that people who have invested in Arturia products know what's going on and feel more secure about the future.