Hopefully, we won't ever have to put that learning into practice. QE is a policy option in Australia, should it be required. There are less government bonds here, which may make QE more effective.
But most of the traction in terms of borrowing rates in Australia is at the short end of the curve rather than the longer end of the curve, which might reduce the effectiveness of QE. The RBA's balance sheet can also expand to help reduce upward pressure on funding, if necessary, as occurred in 2008.