I've been chewing up Shimano chains all too quickly. 1000 to 2000 and they're toast.
And, with a little lapse of attention, my cassette or freewheel is toast too.
I've decided to run a test with Wippermann Connex SX chains. I have a couple of them on order, and am waiting for then to arrive.
My hope is to get 3x as many miles out of a chain, and lessen the wear on the cassettes. I've rotated a couple of chains out, but have been avoiding rotating then back in. However, say I could rotate wear on 4 chains with a total of 5000 miles per chain, I could get a good long use out of the overall drivetrain... hopefully.
Anyway, at least the inside Wippermann wear tests indicate that not all chains are created equal.