I have heard that batteries typically last about 10 years before requiring replacement and the cost to replace can run you about $4k. A big negative for me as I tend to hold onto my vehicles for 15-20 years. My Toyotas/Hondas have easily done that with little or no repairs required.

If battery life is an issue, I also wonder the impact to the used EV car market. I would expect technology to make improvements in the areas of battery life/replacement cost, range and charge time.