Here's an elegant idea for Tesla to deal with degradation. Slowly raise the 10% top buffer invisibly to 9%, and 8% ... as the battery ages. Keeping the advertised range true and steady for longer, at the expense of now slowing the charge times with more pronounced taper.
I suspect they're already doing this. Cars with newer batteries that hit 0% drive longer long than older cars that hit 0% which probably means that as the miles pile up, they're dipping into the anti brick buffer to make the degradation not seem as bad.