Very useful manoeuvre in day fighter tactics, which is highly dependent on a well judged zoom, is the low speed yo-yo. Used by the trailing aircraft in an air combat situation where the hassle has degenerated to both aircraft in max rate turns. The trailing aircraft can make up turn angle and distance by overbanking, sacrificing altitude for speed, continuing a max rate turn with different centre, effectively cutting the corner. The trick being: when is the correct time to fly up to the opponents 6 o'clock and a firing position?
The high speed yo-yo uses a zoom to convert overtaking speed into increased altitude and extra distance flown to avoid overshooting the target.
I would imagine that, these days, yo-yo manoeuvres are analysed and practised to "death" at fighter combat training schools.