I have one of the worst cars for battery degradation (Nissan LEAF). My car is 7.5 years old and has degraded a little under 20%, making your estimate slightly pessimistic but still more right than wrong.
I’m also involved in the electric Smart community and those batteries have phenomenally low degradation, often being above 92% at 8 years, due to excellent thermal and charge management.
I’m also involved in the electric Smart community and those batteries have phenomenally low degradation, often being above 92% at 8 years, due to excellent thermal and charge management.