It being almost home time and being a bit pedantic, the answer to the question is:
Today!
You asked:"By that I mean a manoeuvering fight between 2 or more aircraft to get in position for a shot"
You said nothing about actually taking a shot or any shot resulting in a downing of one or more aircraft, just getting into a position for a shot! Something that is done day in day out in routine training sorties the world over.
Now, if you are asking "why do some air forces spend so much time practicing BFM (basic fighter manoeuvres) when the last time they were actually used in anger has alluded the corporate memory of Pprune", then that is a different story.
Off home now!
Tarnished