[crivabene]

Not sure about Australia, but the most common reason would be local regulations (i.e. laws forbidding to store certain data outside of the borders of a particular region). But given we're talking about Australia, I would not rule out the latency at all.

[Andrenid]

In Australia it might be to attract Gov clients? Not sure why the Home service would matter though other than Australians are big on using services located in Australia.