I bought my Leaf November 2017 with a reasonable amount of tread on the tyres. April 2018, I replaced the lot as they were near minimum. And I've just bought another new set as again, they're near the minimum. I've done about 22k miles since purchase.
Not no-name budget tyres either. Goodyear Efficient Grip Performance (admittedly not the best out there, but they've been very well priced both times I've purchased).
The Leaf is particularly bad though. It has (unacknowledged) issues with the rear suspension which result in uneven tyre wear. One side of each rear tyre has a few months of wear left in it. I'll get the new ones rotated after 6 months I think.
I've also started to tame my driving a bit. In part, that's due to having a baby. But also due to the tyre wear, and the realisation that the car still has plenty of power in Eco mode. I don't really need to hoon it off the line every time I come to a stop. And the power is still there in Eco mode, as the car has a two stage pedal; push it past the first stop point and you get full power regardless).