Well, EllanVannin both my graduate dds did a long working stint in Oz - elder was,there for 2 years working all over - and they enjoyed it, but showed no great desire to stay or return. Both now happily settled here.
General consensus was, too far away from too many places, esp. the relatively cheap and accessible sheer diversity of Europe.
We've been twice on holiday there and much as I've enjoyed it, there was serious drought both times, and raging wildfires. I do find severe drought scary - what can you do when it just doesn't rain? We lived in Middle Eastern deserts for many years - you expect drought there, but it's a different matter in the likes of Melbourne.