Our 2015 Leaf has a “charge indicator” and a “capacity indicator”, each with 12 segments. The “capacity indicator” just dropped one notch to 11, but this hasn’t had a huge impact on range - certainly it still gets us around the city, which is why we bought it.
Nissan estimates the batteries will outlive the cars by about 10-12 years: https://insideevs.com/news/351314/nissan-leaf-battery-longev...