There are plenty already using them in Boats.
Incorporating Automatic low voltage disconnects and high voltage disconnects is where the money adds up. The Individual prismatic cells do not really cast all that much.
Some use them without such automatic battery monitoring devices, and simply limit charge voltage and duration manually to keep them outside the 'knees'
What is likely the best thing about them is not needing to reach full charge. Cycling them between 80% and 20% seems to be the best for them.
One needs to unlearn the lead acid mindset of get them full and keep them full. But so many have never learned that mindset, and simply prefer to complain when their lead acid batteries need replacement.
