"But an IBM-built enterprise backup system for the bank has seen non-scandalous implementation delays. The decision to take DSA in-house is therefore an interesting notable moment in the long relationship between the two. If it turns out the be the start of something bigger, we'll try to let you know!"
https://www.theregister.co.uk/2017/09/15/westpac_brings_distributed_system_access_in_house/