I hate to say this, but battery degradation is almost nonexistent even for people who have 50,000 miles on their cars. The guy who has over 50,000 has a youtube channel New Coulomb and he said his degradation is less than 1%. My car, which has almost 32,000, has about the same degradation. However, I think I just got a lower capacity battery than many users here. My car has always been in the 55 to 56 kWh capacity range. I can't find 1 Bolt user that has even mentioned ANY battery degradation. Battery failure is prevalent, but no degradation. Even the Tesla data I have seen has had much more initial degradation than the Bolt.
People that are long commuters tend not to be hypermilers, we have other things to worry about. My route involves 90% of the mileage where I travel between 70 to 75 mph.