I had to replace my 12" skillet after 15 years of light use!
Reading online reviews it's more common than you would expect.
The stainless steel pans (which America's Test Kitchen rates the top pans) should last darn near forever. But non-stick is not as durable as steel obviously and will wear out on even the best cookware. I've had mine for over 5 years and use them at least once per week and they are still as good as new. They do have some nicks and scratches but are far more durable than any other non-stick brands I've owned.