Ok, that is a good counter example, but what about the example I gave in my original post? These very expensive headphones I bought (AirPods 1) only two years ago are now basically worthless.
I strongly suspect the the "service" is giving you refurbished AirPods with new batteries in them, but it's still cheaper than buying new AirPods. (Although somewhat marginally in the case of the non-Pro model.)
They’re different devices altogether. They serve the same purpose, perhaps, but one is nearly two orders of magnitude larger than the other. It’s like comparing a matchbox car to an actual car.
Also, someone else mentioned a $79 battery replacement for AirPods Max which suggests it is in fact serviceable.
