As one of those who have written that I am waiting for the price of lithium-ion batteries come down, the McKinsey report just about says it all.
I'm not expecting the cost (including implementation) to drop to that of AGM but certainly the price will fall by more than the cost of buying a couple of wet cells now, to be replaced in a couple of years. Hopefully in that time they will also come out with a formulation that can be charged under 40C as well so I don't have to relocate them inside the motorhome.
I think what you guys have done is great, and if it wasn't for the early adopters, demand would not be generated to bring about the economies for scale.
All new technology goes through the Ganter Hype Cycle and too often I have jumped too early, not this time.