Most cars makers don't have enough cars on the rode to provide this number. I think in another few years we will. The biggest datapoint we have outside of tesl

Most cars makers don't have enough cars on the rode to provide this number. I think in another few years we will. The biggest datapoint we have outside of tesla is Nissian. The leaf used air cooling, and degraded MUCH faster. Something like 50% after 6-7 years is common. It is a cautionary tale about making sure your battery temps stay sane.