Regarding Chick-fil-a fries:
The new fries aren't crispier, they stay crispier for longer.
Before, fresh fries were crispy and delicious, slightly old fries were less crispy and less delicious, and old fries got thrown out because they were soggy.
Now, fresh fries are crispy and delicious, slightly old fries are crispy and less delicious, and (notably) old fries are still kind of crispy but taste bad due to being old.
The flavor of the fries didn't change, but the age of the fries you receive might have because they still look good.