There is another very important factor for me at least as a catamaran
person and that is weight.
I'm not picky about a kilo here or there but an 800ah@12v or 400AH@24v battery
is very heavy in LA, as you would know.
When only 1/2 of that is useable it's a lot of dead weight taking up space.
LiFe tech cuts down the space and weight required by a significant amount and therefore is valuable to me. [I can only speak for myself]
If I even get the same lifespan as golf cart batteries [of which I presently have six] I will consider myself in front and the investment validated.
Any greater lifespan will be a bonus, the longer the lifespan the greater the bonus.
My point is, that it's not only the cost per Kw/h over a projected lifespan that is the single
greatest determinant of value for me it's the huge weight/space saving, convenience and safety
Having said that I also think they'll outlast a set of LAs by a long shot. LOL
I hope I'm around in ten years to see if I'm close and I hope I've underestimated.