This hour lapse is why the video was so widely shared. In the Australian publics mind, as the perp was our citizen, we have a lot to answer for.
The livestream was purely to broadcast to his own people (see how he had the names of similar assaulters on the weapon), so the concept here is removing the platform that provides an incentive - in this situation - to do the deed.
Since the guy thrives on being noticed, NZ has actually barered photographs of him unpixalted from the 1st appearance in court. Today they announced total bans on photos and videos until further notice of him at the trial.
Bit of a long winded answer, but this is the link that a lot of the foreign commentary is missing. While the reach is wide of the legislation, there is no 'what about before the internet existed?' claims on how this tech makes things better. It was also considered when people used facebook live for suicide broadcasting.