This whole CI argument is very circular. Military operators have understood for many years the stresses, strains and limitations of human physiology when exposed to extreme G forces. That's why FJ pilot selection is as rigorous as it is, that's why age is known to be a key factor in maintaining the physiological performance required and that's why fundamentally, it's a young person's domain. I genuinely don't understand the apparent surprise and confusion that putting an individual into this environment who is almost certainly not performing to the same physiological standards as they were 20 years ago, may lead to issues with Cognitive Impairment.
Yes, I am proposing that age should be a discriminator in high performance flying. A lengthy study on the instances and effects of Cognitive Impairment could be avoided altogether by a quick check of display pilot's birth date and flying recency.