Our government has invested a lot more into broadband infrastructure than Australia has. We rolled out FTTN (Fibre to the Node) for improved ADSL/VDSL years ago, and now FTTH is deployed in a lot of places so far. Australia proposed FTTH, then rolled back on that. So yes, we're generally much better for Internet than Australia.

Nope, 100% unlimited. Metered connections were a thing here 5 years ago, nowdays you generally get 80GB or so to start with and can upgrade to unlimited for a little extra. I pay $129 NZD ($91 USD~) per month for my unlimited almost-gigabit connection which is the most expensive residential tier available, and I can pick from any number of ISPs (there's like 5 major ones and plenty of tiny players) as the infrastructure is shared, unlike what you see in the U.S. with the cable companies.