...
Houses? Chinese now, probably Indians too. But 60s and 70s it was the Italians and Greeks. Then the Yugoslavs. Turks followed by Lebanese. Vietnamese arrived.
It's always happened.
I would suggest there is a difference now, with a significant number of non-resident / short-term purchases plus a far greater percentage of higher density and skyscrapers.
Pre 80s the Italians Greeks Turks Viet were predominantly migrants moving to stay... And that resulted in huge benefits