One could conclude that derailleurs still dominate in Australia because cycling is still mostly a sport or recreation. Utility bikes are breaking through but, presently, the ones with internal gears tend to be heavy, slow Dutch bikes or too expensive to take the leap of faith.
But if hills, winds or a disinterest in unnecessary exertion put you off a single speed for getting around, I've long considered internal gear hub (IGH) bikes with 3 to 8 speeds to be - at least in theory - the next best alternative. Especially, if you want to minimise bike maintenance and service costs, leave your bike exposed to the elements all year round, and don't use most of the gear combinations on a 20+ speed bike.
A recent clearance price ($399) on a commuter bike with a 5 speed Sturmey-Archer IGH has led me to finally having the opportunity to use a common IGH bike and in this post I will provide guidance on suitability, finding the best option, saving money, and will also update the long-term results (maintenance required, mileage I get out of the IGH). Because of the wider steps between IGH gears, my Sturmey Archer 5 speed (wide range model) is delivering ~80% of the effective range of my 20 speed road bike.
XDS Adult Street with 5 speed Sturmey-Archer internal gear hub