Local TV no longer has the resources to pump out this stuff for hours on end and it’s no longer viable to fly in talent from interstate just because it’s always been done this way. As good as the cause might be, being a good corporate citizen isn’t free.
In addition, you’re producing hours of television on end for a diminishing market. Better to focus resources into a shorter format that, in prime time, people might watch rather than wasting money producing TV through the wee small hours for no return.
Wouldn’t stun me if the Melbourne telethon cut back in the near future too, maybe it already has. They’re a nice idea but a dated concept.