Your logic is flawed and/or the statement misleading. While storing more than a single bit with bit error rate >= 50% does require at least some error modeling

Your logic is flawed and/or the statement misleading. While storing more than a single bit with bit error rate >= 50% does require at least some error modeling, it does not mean profound implications on information theory¹. Yes, normal SSDs would not have raw bit error rate anywhere near 90%. Still, I recall tales of flash media approaching raw 90% error rate - mostly shitty SD cards making use of the not-completely-trashed sectors of scrap high-capacity chips with heaps of ECC. ¹ unless you really do mean general (theoretical) 90% error correction, which would indeed imply things such as P = NP and P != NP, yet it cannot be applied as an argument on specific real-world errors.