Quality of information trumps quantity.

Tire life is dictated by condition , condition , condition. I've got nearly 20 year old tires in soft uncracked condition that I'm OK driving round town on and I've taken off 8 year old tires I would not drive any distance on.

If the car is stored out of direct sunlight and not driven for hundreds of miles across the desert, tire life greatly increases. I would not drive the 20 year old tires at 80 MPH for miles on end but they would be completely fine for sub 50 mph around town use.

I've had a couple of tires break belts and none of they were over 10 years old from what I recall. There was ample warning that a belt was shifting and they never lost air. Even with "new" tires, one must be attentive that a new vibration is increasing in intensity and needs attention.