This is all rapidly becoming academic. Four new 50kw fast chargers have opened in Auckland in the past 2 weeks. A new 50kw fast charger just opened up in Thames this week. There is a 30amp charger just 16km down the highway at a Spark phone box at Waitakaruru. There is a 50kw fast charger being installed now in Rotorua. Tokoroa to follow. There soon won't be any scope for 'range anxiety' because there will be enough chargers around you can't get stuck anywhere unless you've lost the plot.
Unless you are in the South Island .. doesn't seem to be the number of fast charges around or being built compared to the North.