It will be interesting to see how they hold up over time. 40,000 cycles at 17 C is only 98 days. Lithium-ion batteries are also rather cycle insensitive, but die in about two years.
Reversing your math it seems you are implying 17 cycles per hour? Why in the world would you charge and discharge a battery 17 times per hour?
I don't even think it's possible to do that - it takes longer than 3.5 minutes to charge a battery.