Shouldn't SD cards have an expiration date? What if you buy a card that's been sitting on the shelf for a year? If the flash was blank at manufacturing, it wou

Shouldn't SD cards have an expiration date? What if you buy a card that's been sitting on the shelf for a year? If the flash was blank at manufacturing, it would remain blank after a year as there would be no charge to leak out. The problem is when the controller also stores its firmware on the main NAND, but AFAIK that isn't the case for SD cards (which have very little in the way of firmware compared to SSDs.)