“Anyway, I’ve been running it on my rigid MTB for that time, got through 2 chains – changing them at 0.75 – and probably done 2000km on it with no issues.”
That’s good to know!
With a full power ebike being ridden hard I think there’s just too much load on the teeth for the Microshift cassette to handle it – a normal 11 speed SLX cassette was good for 600 miles and tolerable for 600 more (poor shifting but otherwise ok), the LinkGlide cassette is 1600 miles in and still working well, whilst the Microsoft cassette was causing the chain to skip at 200 miles, which was awful.