I had a new chain put on my Alfine-hubbed commuter bike at the start of February. I've cleaned it with baby-wipes and oiled it regularly and it looks like new. According to Strava it's done 402 miles since then 80% of that on the towpath, where there's been little salt.
I've just been out with the chain wear tool, and it says that chain is more than 1% worn. In other words, it says it's time to replace it.
So, do you think that's reasonable? I know chains are consumable, but this one really doesn't seem to have lasted...