Errr ... don't even know what that refers to :p.
Growing up, my TV entertainment was ABC in the evenings post the 7pm news and 7:30 current affairs. The 8pm slot on a weekend was normally dedicated to shows imported from UK - so my TV memories from the 80's and 90's include the original All...
Yup, and ACGS apparently cheaper to make (as well as being local).
From what I read, the problem with Neighbours wasn't the ratings. It was the huge cost to produce it. Channel 5 has been funding that for a long time now, I'm guessing it's now reached a tipping point where even they are now...