There was a really great writeup by someone who worked in that Disney animation shop on a blog I once stumbled on - he wrote about how he took on the 'job of a lifetime' as a teenager while his mother was terminally ill and how that impacts your priorities.

Incredibly moving read that I unfortunately can't find now, but it covered how the Sydney office ended, from memory it was a combination of CGI changing the industry, and cost - Australian wages weren't cheap and the studio was mostly used for producing direct-to-video sequels which was a market that dried up.

The actual big influence on the Australian-American cross pollination though, I suspect, was Rupert Murdoch's expansion into the American film and TV industry. For all his faults, he was a big champion of talent from his homeland in both his movies and Fox TV network. Even the infamous Simpsons Australia episode was likely influenced by the big influence of Australians at Fox at that time.

Apart from the "Crocodile Dundee" and "Men at Work" phenomena in the late 80s, there is no real cultural pollination between Australia and the US, as far as I can tell. It's too far away and there are no real reasons for Americans to visit, nor are there enough internationally notable Australian music brands, films, or products that give visibility to the country, which is one price of being a commodity producing nation rather than finished goods. We know about Japanese and British prodigious cultural output, Japanese manufactures, German cars and Swiss machine tools and watches, but what product makes Australia stand out? Coal, copper, etc.

Didn't Australia used to have an auto industry? I kinda feel like Australia stopped producing culturally relevant output in the late 80s or 90s.

Trump.