Flash, by design, only admits finitely many write cycles, but this does not mean SSDs "never become unreadable", only that they never become unreadable as a res

Flash, by design, only admits finitely many write cycles, but this does not mean SSDs "never become unreadable", only that they never become unreadable as a result of the finite rewritability of Flash. In theory. In practice, the fact that your data is "really still there" means very little if the controller refuses to read it, SSD firmware is complex and therefore bug-prone, and reading in the "worn out" state will always be a rare edge case, so it's not something I'd care to test without good, current backups.