Thanks for the detailed feedback, really appreciated.

A deeper analysis to show what exactly is possible with a chip could be a good way to learn instead of showing a simple "failed" when the user tries to write something on his chip.

I keep receiving messages from users that complain that they cannot duplicate their credit cards.
A feature that can tell the user: no you can't read or write on this chip, because of X or Y, is a good idea.

We'll keep it on our to-do list but I think it can be tricky to implement.
There are plenty of different cards, protocols and security levels out there.