Battery degradation is a big concern for EV owners and haters alike. We've become accustomed to huge capacity losses on our phones and laptops after a couple years, but in your car, you need it to be 100%, especially during the warranty period.
In the older Nissan Leaf, they even have a mode that only lets you charge to 80% to maintain battery life (but really, who can get by with only charging to ~70 miles of range on a daily basis?)
GreenCarReports first spotted this interesting (in a bad way) tidbit of information in the owners manual:
Like all batteries, the amount of energy that the high voltage “propulsion” battery can store will decrease with time and miles driven. Depending on use, the battery may degrade as little as 10% to as much as 40% of capacity over the warranty period. If there are questions pertaining to battery capacity, a dealer service technician could determine if the vehicle is within parameters.”
Up forty percent loss? That's nearly 100 miles of range loss, inside the warranty period!
Tesla has no specific number that their warranty will cover, but http://www.teslacentral.com/worried-about-tesla-battery-degradation-its-23-miles-every-100000-driven, or about 10%.
I've made it pretty clear that I'm highly critical of the Bolt overall, from the pricing, to the lack of DC fast charging on the base model, to the limited rollout, but this would make me think twice about buying a Bolt. Maybe when you can pick one up used really cheap, or if you only plan on leasing it, it might be ok.