For those who already have a foreign connection, it can be a no brainer. My only concern, personally, would be for medical costs.
Yes, zero tax on capital gains is a benefit but the medical is a big one with expensive expat health insurance. Also, something related as sptrawler mentioned:
Not only can you lose 50% of your capital, as was shown last election, you can lose 30% of your income. The really scary part was, many were cheering it on.
The government is looking at updates to the residency rules: https://cdn.tspace.gov.au/uploads/sites/70/2018/09/BoT-Residency-Consulation-Guide-FINAL.pdf
Who knows what that will bring.