I also disagree. There has never been an incident of a rope breaking that was not caused by a sharp object of some type.
my last 9.5mm lasted for 5 years and i still use it for gym leading since i had to cut off a core shot so it's only 56m. my 9.8mm had wear issues and Mammut replaced it. my new 9.5 is starting it's 2nd season
i am on my 3rd harness in 13 years of climbing.
Time almost has no bearing on quality of softgoods. stuff will wear out far faster than it 'breaks down'
Todd Skinner was a professional climber and guide.. he put more wear on his harness than any of us could imagine. he recognized that it was worn out but did not replace it, time had nothing to do with it.. belay loops are insanely bomber.. they don't 'break down' it wore out and it cost him. many new harnesses have a red layer stitched into them so that if the outside sheath wears out then the red will show through and you can judge how much it is worn.
Edit: how don't they store their stuff properly? who do you climb with? Most people i climb with keep their rope in a rope bag as i do. my harness stays on a shelf in my basement along with all of my other climbing and camping gear. How much climbing do you actually do?

