Do you know the reason why PPGZ never aired in North America, most of Europe, the Middle East and Africa? I still think that the reason why PPGZ never aired in the US was because a dub separate from the Ocean Group one was planned for the American audience, but never materialized.
Retro kids shows are like fries. They complement both steak(retro grown up shows) and burgers(modern kids shows), but are NOT to be used as a main course. Kids won’t watch a network focused on retro kids shows because they’re focused on new(or at least modern looking) shows, and adults won’t watch a retro kidvid network because they think that they’re too old. Hence, all retro kids networks either change focus or die