When the NBN was first touted over a decade ago, we expected a high-speed network using the latest technology. But after a change in government we saw the original vision crushed and we landed with the multi-technology mix pushed by the Coalition government.

That's left us with a mix of technology that has made NBN Co's deployment task more difficult and led to consumers getting a wild mix of different performance outcomes. Now, the outgoing boss of NBN Co has spoken out, saying the use of copper is at the heart of many of the network's problems.