The single data point I have of 75k miles, once a week charging at 120kW from ~20% -> 60% shows very little degradation to the pack on our Model S.
Also, when it's warmer out I've seen warnings that in-cabin AC is lowered to divert to help cool the pack so I'm sure it's a question of thermals + number of parallel modules.
That's still a lot of DCFC(~20k miles based on 0.33kwH/mi) and even then it's limited down to 90kW from 120kW.
FWIW you only see 120kW on the first ~35% of the pack and quickly tapers down to sub 100kW after that approaching home charging speeds for the last 80-100%.
The single data point I have of 75k miles, once a week charging at 120kW from ~20% -> 60% shows very little degradation to the pack on our Model S.
Also, when it's warmer out I've seen warnings that in-cabin AC is lowered to divert to help cool the pack so I'm sure it's a question of thermals + number of parallel modules.