I reckon the only thing I really know is that I don't know!
I have seen so many changes over the course of my career and I never imagined that Ansett would fall over, that the industry would fracture the way it has into the various players we see today.
About the only thing that hasn't changed significantly is the aeroplanes! The 737 is essentially a 50 year old design with some tweaking, the 320 and 330 are, at their core, 20-25 years old, the Jumbo is on its way out (in oz anyway) and the 767 has basically gone (apart from the freighter). The dash 8 I did my endorsement on 25 years ago is still flogging around as are many (most) of the GA aeroplanes I flew. Even the 787 is a few years old now as a design.
I must be getting old, nostalgia is creeping up on me.