Today I've been driving approx. 150 km along the Perth freeway and Reid highway. I was spotting for older cars, but I didn't see as much as one Falcon AU or any other older Fords. Also didn't see many other cars age 10+ years either. (Saw a few Camry from the 90s that was all).
I take it that owners of old cars don't drive far, don't drive on freeways on Saturdays, or don't live near Perth CBD and western suburbs.
I think many of the older cars are perhaps car #2 and are doing short distances, or perhaps are in more remote areas.
Cheers,