It also has to do with how a person treats their cookware. I don't abuse mine. The majority of my cookware is between 20 and 30 years old, purchased from WalMart or equivalent store, and one pot and skillet, about 25 years old, still have their non-stick coating completely intact and non-stick. Why? Because I have never allowed any metal utensiles to be used in them.
I've only had one shallow fry pan warp, and that's because I made the mistake of over-heating it when I got sidetracked doing something else.
My great grandmother had two settings to her stove: Off and On 100%. She never adjusted a burner - went through one set of cookware per year, and was a terrible cook! LOL! But she made great lace tablecloths.
I'm not saying inexpensive cookware won't warp under normal use, but my experience has been that taking care of things and not pre-heating them beyond normal cooking temperature, can extend their life.
"Food is our common ground, a universal experience." - James Beard