Our Mortgage is with CBA. We have looked at moving it, but sadly it's not really worth our while right now (or the hassle involved). We check on a regular basis though. Our primary credit card is with them as part of the mortgage package though I have an Amex I already use with Apple pay.
Sidebar: I wish all retailers who didn't take Amex had signs up stating as much. I always ask when it's not obvious that they do, and they always so no.