I get the impression that Tesla has some of the best in the business battery management. That impression is from following Tesla users a bit, including the stories of some of the taxi/limo fleet users, but only passingly. It seems like users were seeing evidence that the batteries would last a million miles with 20% degredation, that was back in 2017/2018, not sure if the battery chemistry has changed that at all.

But, it makes me wonder if the other car companies will have similar levels of battery management or suffer from early death. Considering how large a proportion the battery is of the total cost, it makes sense to have some great management.