What amazes me is seeing people selling old Macs on ebay with mice and keyboards that still work. Mine break in a matter of months. Keyboards die when dust gets under them, sweat would accumulate in old mouse scrollballs and make them unusable, and so on. I guess they just keep them in the box until they're ready to sell.
I was particularly impressed when one acquaintance with a disturbed mind and bouts of homelessness returned a gift laptop to me after 5 years, thanking me for it and telling me he had bought his own. It was in utterly pristine condition, With not even a worn key. He had treated it better than himself.
Well, one mouse and one trackpad didn’t survive a recent toddler/tile floor situation. But that’s not Apple’s fault ;)
For example, recently I went back to a cheap 5 year old Logitech keyboard because my expensive Magic keyboard got stuck keys. It didn't even last 2 years of use. The Logitech one still works flawlessly.
I removed the key cap but the problem was in the switch itself.