Tire rubber duro goes up with age (up to a point) and, IME the harder, cured tread material is much more resistant to the small nicks and glass cuts that are the major causes of flats.
Generally, my old ratty tires can outlast many replacements on the other wheel, and if they can survive a year, tend not to flat until the UV and water finally gets to the walls and they begin to break apart.
In that respect tires are like jeans, they get better with use until they get so good they just fall apart.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.