Any electric car you buy, make absolutely sure it has a TMS (thermal management system) for the batteries. Air cooling is not enough, it must be liquid cooling.
Liquid cooled batteries have a much, much longer overall lifespan than passively air cooled batteries, as shown by the drastic difference in range loss over time between the Leaf and Volt (or early Teslas).
The Leaf being the TMS one? I will look into it, thanks!