Nothing much has changed then. In the mid 60s we sometimes struggled to get two or three Hunter FGA9s ready for flight first thing in the morning. That was out of a squadron of 19 aircraft.
There were only two occasions that I recall when we got all 19 aircraft out of the hangar at the same time.
One was when we stopped all flying for a number of days so that we could get 18 airborne for a flypast to celebrate our 50th anniversary. The 19th aircraft, Delta, was in the line up for the photos, but had to have its rudder tied on with string. Some would say that Delta still flew in the flypast as there was some part of it flying in all the other 18.
The other time when there was some threat during Indonesian Confrontation, when all the aircraft were grounded so as they would not go US. But at that time they were not on the line, they were dispersed all over Tengah.