Flash replacement - Hurrah!
Flash without serious endurance issues
Flash without dodgy controller firmware that hides the impending doom by shuffling blocks (sometimes correctly)?
Flash that allows you to delete/erase those hidden blocks?
Flash where the special commands to do that erasure actually _works_?
OTOH, with 1Gb chips, a 128GB memory would cost too much to use the normal "retirement" process involving heavy construction equipment and thermal lances.
OTOOH, those extreme measures may not be needed...