Actually, the old chain had about 2k on it, maybe less. My
park CC-3 reading was between .75% and 1.00%.
I also just flipped the chainring around, which also had less than 2k on it. The only thing that had 3500 miles of use was the cog. That cog came with a rear wheel which came stock on a Raleigh Rush Hour. The wheel was a take-off from a shop that I got new, along with the cog, lockring and freewheel.
And I keep my drivetrain very clean.