It would be great if we had the ability to reformat purchased cards into MYO cards, for instance when a child has outgrown a card. For example, you might buy the duplo pack of cards for a child when they are 2 yrs old, but by the age of 4 to 6, the child would have outgrown the cards and your then just left with useless plastic. If you could reformat the cards to be used as MYO cards, then the physical card would have a longer lifespan, reducing plastic waste. Best to reuse and recycle where we can.