Not sure why you are getting downvoted, they must have a vision of 77 being a crumbling old man, but out in Vancouver I see people in their 70s doing mountain hikes and jogging, and have their full faculties. There should be testing across the board as we age, but age shouldn't have be a cutoff for license. My great uncle gave me a ride home once, he was 95, he was 100% with it mentally, and handling the manual transmission like a champ. He was a great driver.

My grandmother was still driving a car at 98. She should definitely have been stopped years earlier.

I'm fully in support of requiring older drivers to retake a driving test if they are safe drivers then there is no problem but we need to identify the unsafe ones dementia and Alzheimer's can hit it anytime. My Grandfather died in his 60s of what was probably Alzheimer's.