It is interesting but hardly ever brought up, during these conversations, that most accidents are caused by people under 25.
But is that because elderly drivers drive fewer miles?
On that question and this topic, from 2008 and Texas...
Crashes involving elderly drivers fall; year-old Katie's law may change
Research by the Insurance Institute for Highway Safety shows seniors drive fewer miles than people in other age groups and are involved in relatively lower rates of police-reported crashes per capita.
But older drivers are involved in a relatively high number of crashes per mile. What's more, seniors will probably account for one out of every four American drivers by 2030, a considerable jump from the current tally of about one in seven.
FWIW, graduated licensing is a good idea for teens, and I think it would also be a good idea for seniors.