A Camel is a Horse Designed by a Committee
The problem is the NBN was designed by a committee too.
I've got the NBN. First thing they do is install a battery backup system to run everything in case of a blackout.
This is a total waste. Firstly a lot of homes now no longer run a home phone. Secondly of those who do, most have a cordless phone that doesn't work without power anyway. Most people don't care because there is at least one mobile in the house.
The only person who needs a battery backup land line is an old technophobic person so you could get rid of 95% of the battery backups and nobody would care.
Yes I know about alarms and monitoring systems. Alarms these days often hook up via mobile and even so, they already have a battery backup system in them. There is also no reason why someone who wants a battery backup to not go and buy a UPS.
The NBN should supply just the fibre. The supplier should provide the hardware based on the customer's needs.