Hats off to Steve for that detailed and informative contribution: thanks so much. I had heard similar stories from a professional engineer friend...
Nonetheless, I still think some kind of communication from Line 6 would be appreciated. It's all very well that they're in the same boat as 180 other vendors, but for the average non-expert like me: imagine the warm glow that we would get if Line 6 took the front foot and said - and kept saying - how much they love and value their customers, how frustrating it must be, and how they're working on the update as hard as they can with the limited resources they have. In my experience that kind of candour from a vendor is worth a huge amount.