So, two things:
1. Consistently charging to 100% on fast charging is where most of the damage happens. He is slow charging at home, so this isn't an issue.
2. Holding the vehicle at 100% for extended periods of more than a few days also causes damage. If the vehicle gets L2 charged to 100% overnight and then is used for commuting every day, there are very few negative effects.
That said, two other things:
1. Letting the battery go towards zero is good for the battery and the software calibration. It won't harm things if you don't, but doing so keeps your range estimates accurate.
2. Those with short commutes do not need to charge daily on long-range EVs like this. Yes, it's neat that you can start every day at 100%, but each charge cycle is still a cycle, and there is an upper, though undefined, limit on the number of charge cycles the battery will take. Taking a more ICE-like approach of only charging when needed will extend battery longevity. Plugging it in only every few days when the SOC gets to ~20% is fine. Of course, if you know you have a longer trip coming, fill it up ahead of time just like you would with a gas car.