I came across an interesting site where you can look up any make/model of car and find out how many are still registered:
https://carsafe.com.au/risk-rating#
This is something I've always wondered about. I found out:
There are still over 80,000 AU Falcons registered in Australia. This means that 1 in 3 sold are still registered. This is exactly comparable to the number of VT Commodores that are still registered (also a bit over 80,000 or 33% of original numbers).
With the BA, 2/3rds (66%) are still on the road. Going back to the EF/EL, their numbers are really starting to thin out, with less than 40,000 of them still around (only 13% left).
For the Holden comparison, about 15% of VR/VS Commodores (46,000) are left.
With the Ford Territory, 93% sold are still registered, which isn't too surprising I guess, seeing as the oldest ones are now still only 14 years old.
The Japanese, as you would expect, are doing considerably better - for example, 30% of 1994-1997 Accords are still registered, and almost 75% of 1998-2003 models are still on the roads (compared to 33% for the Ford/Holden equivalents!). Incredibly, 60% of first generation (94-00) RAV4s are still on the roads, even though these vehicles are now 19-25 years old!