Hi Mayken4now, I've been here pretty regularly but post less often now. I don't have much to do with vintage machines any more so I don't have so much to say...
Australia is still probably mostly top load and cold wash, but front loaders are now a big proportion of the market. In the 1980s most retailers would only stock two front load models, locally made Hoover and Pacific. (Pacific was a local rebadge on a Gorenje machine from what was then called Yugoslavia.) Miele, Bendix and AEG were around too, but only from high end specialist stores. Now a retailer would probably have twice as many front loaders on the floor as top loaders, but the biggest seller would probably still be Fisher and Paykel top loader.
and back on topic....I really admire these Hoover 500/600/700 series machines. They have proven to be really sturdy machines, easy to service, and wash way better than their main opposition at the time, the Simpson top loaders and belt drive Malleys Whirlpools. My partner had one when I moved in with him 30 years ago this year...we gave it to my sister when she was washing babies nappies (diapers) in her Panasonic top loader and its circuit board fried from the steam given off by the hot water washing. The Hoover washed nappies and clothes for several years, then it got pensioned off when they upgraded to a Bendix front loader, and the Hoover 720 went out to the stables to wash racehorse blankets, which it did reliably for several more years.