I was surprised to learn that "lifetime warranty" nowadays means that the warranty is valid for the expected lifetime of the product, not the owner. So the comp

I was surprised to learn that "lifetime warranty" nowadays means that the warranty is valid for the expected lifetime of the product, not the owner. So the company arbitrarily decides that e.g. a pair of headphones should last 5 years, they specify that somewhere in the fine print and just call it "lifetime".