This has always been true for anyone who knows anything. Batteries rapidly deteriorate from 100%, but the degradation gets slower the more capacity has already been lost.
Even for consumer devices, battery aging and capacity loss is very slow after 70%, and they are exposed to much harsher conditions than EVs (no temp control, daily full cycling, etc).
Even for consumer devices, battery aging and capacity loss is very slow after 70%, and they are exposed to much harsher conditions than EVs (no temp control, daily full cycling, etc).