State of the art is a bit over the top.
A320 first entered service around 1988.
767-300 first entered service around 1986.
I dont think that 2 years made a huge difference, albeit the 767-200/300 started development well before that.
The A320's may be newer, but the 767 over the years has proved itself a pretty reliable workhorse. Hence why it is always sent to pick up Jetstars stranded passengers.........
