All 11 speed chains as far as I can tell are recommended to be replaced at 0.5%, where as 10 (and under) speed chains are recommended to be replaced at 0.75%. In my personal experience, I tend to get 1500-1800 miles out of an 11 speed chain before it hits 0.5%, and I am meticulous with cleaning and lubing. I skipped a generation so I never rode 10 speed, but my 9 speed chains used to get easily 4,000-5,000 miles before hitting 0.75%.