I got curious about this matter some months ago.
Asked ChatGPT. At what age should elderly stop driving?
The reply was superb. Went like this:
The recommended age is 75. There is a great deal of evidence to suggest that 75 yr old drivers are safer than 20 year old drivers. There is plenty of evidence that elderly drivers know the rules of the road and have ample reflexes.
The reason for recommending 75 is recovery. The old in even a minor wreck are at much greater risk of permanent disability or death than the young. Old bodies heal more slowly or not at all.
Bad answer AI. Old passenger will have the same bad recovery as old driver.