The Indigenous culture here is dying off at an alarming rate, and little care is aimed at this travesty.
Most traditional Aboriginal cultures have already been lost since British settlement. Depending on who you ask, there might have been 600 independent cultural-linguistic "nations" in Australia in 1788 with the British claimed approximately 2/3rds of the continent as "New South Wales".
Nevertheless, a large amount of traditional culture still exists throughout the centre and north of the continent. I am from Darwin in the Northern Territory, for example. Just a few hundred kilometres from that beautiful little town you can find traditional law being practiced in all directions.
What cultures have survived are being studied by anthropologists, linguists and the like. Similarly, dreamtime stories and rituals are often sought for insight they can give into historical events and geological features.
I don't think that all elements of some existing traditions are praiseworthy and deserving of retention. In many places, for example, traditional law is brutal and inhumane. However, much as European culture grew out of the comparable brutalities of the classical world, we can adopt and learn the best elements of tradtional cultures and combine them within our own in the centuries ahead. And that's not necessarily a bad thing. Stasis can be as destructive to cultural survival as anything else.