To access a previous card, you could have a small target for each. The front one can always have a large target. The card metaphor has no value. No extra inf

To access a previous card, you could have a small target for each. The front one can always have a large target. The card metaphor has no value. No extra information is communicated, and yet it is expensive to program and display. UIs always look like they work well when demoed by the creator. Show me a usability test with this, and then you'll see the reality.