I qualified as a military pilot some 30 years ago and all checks HAD to be learned and executed from memory. For 95% of us this involved sitting in an aircraft on the ground/in the hangar often with a fellow stude for hours on end until we cracked it
Checklists, whilst carried in our pockets, could only appear for SOME emergency drills.
Today, I use a checklist and take all the time I need
