With the exception of DVD and hard disk bad sector error correction, none of your examples are relevant because they are temporary conditions that are reversibl

With the exception of DVD and hard disk bad sector error correction, none of your examples are relevant because they are temporary conditions that are reversible. With persistent media failures there is an issue of data at stake, and replacement would cause data loss, so the next best action is to recover as much as possible. It's already in failure mode. In all of these cases graceful recovery is appropriate because there is no other alternative. Apple does have an alternative. The battery issue is neither irreversible nor has any permanent ramifications to the remedy of just replacing the f-ing battery. In fact I have no problem with graceful degradation as a stopgap. Explicit Power Saving modes already do that. But the issue at hand is completely orthogonal and has to do with why Apple refuses to, at the same time as undervolting, also signal to the user the one sane action to take, which is to obtain a battery replacement. By not signaling such and misdirecting (whether intentional or not), they are passive-aggressively telling the user to replace the entire phone. How else would a typical user interpret this situation? In what way could they know the appropriate action to take from observation? You think a company that prides itself on every meticulous detail of the UX just "missed" this?