Jayco is useful because it is not a clean regulator win across the board. The Court rejected significant parts of the ACCC's case, but still found a misleading representation to one consumer about being limited to repair when the ACL can provide refund or replacement rights.
For businesses, that makes the lesson sharper. You do not need a perfect storm to create risk. A single customer-service statement, warranty email or repair response can misstate consumer guarantees if the team treats the manufacturer's warranty as the whole answer.