45/45 was rather girly
45/90 was the standard ISTR, 30/45 was the very basic manoeuvre.
After fatigue pentaly factors were applied for running landing, wingover etc, it was found that people had been operating the aircraft out of manufacturers guidance for many years.
45/45 was just fine...but had little application for warfighting! Pretty useless in fact.
The fighter affil and Tac form JSP after much development only ever called for 30 degrees AOB and no wingovers. Guess bored QHIs created the requirement.