vortexnz: How resilient is the chorus network to power outages - like more so than HFC or is it just luck of the draw whether the cabinet still has power or not? - do they use UPS in cabinets for example or is it just lights out when the powers out?

Chorus UFB is powered from exchanges. Most exchanges have big Eaton DC plants with lots of batteries and a backup generator.

So its fairly resilient.