Sure, I don't expect to have one pair for the rest of my life, but 3-5 years of average homeowner use seems acceptable. I wear them for a few hours some evenings, then maybe an entire day on the weekend when the weather is nice...not it's like I'm a service plumber crawling around in them for 10 hours every day, plus I'm in New England, where I don't wear them at all from November to March.
But I see your argument - perhaps my expectations are overly high. Thank you very much.