Looked at the IR website just now, there is a prominent box showing a hand holding an IR SMartcard with a banner 'Smartcard, Register, Top up or buy a smartcard'.
If you click the link on Smartcard there is a full explanation of their own card but not a sausage anywhere on their home page about the Leap Card.
As I understand it, the IR Smartcard can only be used within the 'short hop' zone so there is no possible journey where you can use the IR Smartcard but not the Leap card. Clearly IR have their heads in the sand and are trying to pretend the Leap card doesn't exist.
Surely after blowing €55 million, some minister should be knocking heads together?